Problem:
Score : 100 points

Problem Statement

In order to pass the entrance examination tomorrow, Taro has to study for T more hours.

Fortunately, he can leap to World B where time passes X times as fast as it does in our world (World A).

While (X \times t) hours pass in World B, t hours pass in World A.

How many hours will pass in World A while Taro studies for T hours in World B?

Constraints

All values in input are integers.

1 \leq T \leq 100

1 \leq X \leq 100

Input

Input is given from Standard Input in the following format:

T X

Output

Print the number of hours that will pass in World A.

The output will be regarded as correct when its absolute or relative error from the judge's output is at most 10^{-3}.

Sample Input 1

8 3

Sample Output 1

2.6666666667

While Taro studies for eight hours in World B where time passes three times as fast, 2.6666... hours will pass in World A.

Note that an absolute or relative error of at most 10^{-3} is allowed.

Sample Input 2

99 1

Sample Output 2

99.0000000000

Sample Input 3

1 100

Sample Output 3

0.0100000000

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.IO;
using System.Linq;
using System.Text;
using static System.Console;
using static System.Math;
using static Macro;
using static LinqExtension;
class AC {
    /*------------------------------------------------------------------*/
    double T, X;
    void Solve() {
        io.i(out T, out X);
        (T / X).Prt();
    }
    /*------------------------------------------------------------------*/
    void Test() {
        //--- TEST ---//
    }
    public static void Main(string[] args) => new AC().Stream();
    IO io = new IO();
    private void Stream() {
        /*
        var exStdIn = new System.IO.StreamReader("stdin.txt");
        SetIn(exStdIn);
        Test();
        */
        Solve();
        io.Flush();
    }
}
class IO {
    #region INPUT
    #region FastRead
    private const int Size = 1 << 12;
    private readonly Stream _stream = OpenStandardInput();
    private readonly byte[] _buffer = new byte[Size];
    private int _ptr = 0, _buffLen = 0;
    private bool HasNextByte() {
        if (_ptr < _buffLen) return true;
        _ptr = 0;
        _buffLen = _stream.Read(_buffer, 0, Size);
        return _buffLen > 0;
    }
    private byte ReadByte() {
        if (HasNextByte()) return _buffer[_ptr++];
        else throw new EndOfStreamException("inputの末尾の改行がないとerror");
    }
    private bool IsAscii(int c) => '!' <= c && c <= '~';
    private char NextChar() {
        var b = ReadByte();
        while (!IsAscii(b)) b = ReadByte();
        return (char)b;
    }
    private string Next() {
        var sb = new StringBuilder();
        for (var b = NextChar(); IsAscii(b); b = (char)ReadByte()) sb.Append(b);
        return sb.ToString();
    }
    public string String => Next();
    public char Char => NextChar();
    public int Int => int.Parse(Next());
    public long Long => long.Parse(Next());
    public double Double => double.Parse(Next());
    #endregion
    #region LazyRead
    private void scan<T>(ref T x) {
        if (x is int) __refvalue(__makeref(x), int) = int.Parse(Next());
        else if (x is long) __refvalue(__makeref(x), long) = long.Parse(Next());
        else if (x is double) __refvalue(__makeref(x), double) = double.Parse(Next());
        else if (x is char) __refvalue(__makeref(x), char) = NextChar();
        else __refvalue(__makeref(x), string) = Next();
    }
    public void i<T>(out T t) {
        t = default(T);
        scan(ref t);
    }
    public void i<T, TU>(out T t, out TU u) {
        i(out t);
        i(out u);
    }
    public void i<T, TU, TV>(out T t, out TU u, out TV v) {
        i(out t, out u);
        i(out v);
    }
    public void i<T, TU, TV, TW>(out T t, out TU u, out TV v, out TW w) {
        i(out t, out u);
        i(out v, out w);
    }
    public void i<T, TU, TV, TW, TX>(out T t, out TU u, out TV v, out TW w, out TX x) {
        i(out t, out u, out v);
        i(out w, out x);
    }
    public void i<T, TU, TV, TW, TX, TY>(out T t, out TU u, out TV v, out TW w, out TX x, out TY y) {
        i(out t, out u, out v);
        i(out w, out x, out y);
    }
    public void ini<T>(out T[] a, int n) {
        a = new T[n];
        for (int i = 0; i < n; ++i) i<T>(out a[i]);
    }
    public void ini<T, TU>(out T[] a, out TU[] b, int n) {
        a = new T[n];
        b = new TU[n];
        for (int i = 0; i < n; ++i) i<T, TU>(out a[i], out b[i]);
    }
    public void ini<T, TU, TV>(out T[] a, out TU[] b, out TV[] c, int n) {
        a = new T[n];
        b = new TU[n];
        c = new TV[n];
        for (var i = 0; i < n; ++i) i<T, TU, TV>(out a[i], out b[i], out c[i]);
    }
    public void ini<T>(out T[,] a, int h, int w) {
        a = new T[h, w];
        for (int i = 0; i < h; ++i) for (int j = 0; j < w; ++j) i<T>(out a[i, j]);
    }
    #endregion
    #endregion
    #region OUTPUT
    private readonly StreamWriter _sw = new StreamWriter(OpenStandardOutput()) {
#if DEBUG
        AutoFlush = true
#else
        AutoFlush = false
#endif
    };
    public void Flush() => Out.Flush();
    public void YN(bool f) => f.YN();
    public void Yn(bool f) => f.Yn();
    public void yn(bool f, string y = "yes", string n = "no") => f.yn(y, n);
    #endregion
    public IO() { SetOut(_sw); }
}
static class Macro {
    public static void FOR(int a, int b, int n, Action<int> f) {
        for (var i = a; i < b; i += n) {
            try {
                f(i);
            } catch (IndexOutOfRangeException e) {
#if DEBUG
                WriteLine($"IndexOutOfRange at [{i}]");
#endif
            }
        }
    }
    public static void FOR(int a, int b, Action<int> f) => FOR(a, b, 1, f);
    public static void REP(int a, Action<int> f) => FOR(0, a, 1, f);
    public static void REP(int a, int n, Action<int> f) => FOR(0, a, n, f);
    public static void FOREQ(int a, int b, Action<int> f) => FOR(a, b + 1, 1, f);
    public static void FOREQ(int a, int b, int n, Action<int> f) => FOR(a, b + 1, n, f);
    public static void REPEQ(int a, Action<int> f) => FOR(0, a + 1, 1, f);
    public static void REPEQ(int a, int n, Action<int> f) => FOR(0, a + 1, n, f);
    public static T MIN<T>(params T[] xs) => xs.Min();
    public static T MAX<T>(params T[] xs) => xs.Max();
    public static IEnumerable<Tuple<T, U>> ZIP<T, U>(IEnumerable<T> x, IEnumerable<U> y)
        => x.Zip(y, (i1, i2) => new Tuple<T, U>(i1, i2));
    public static IEnumerable<Tuple<T, U, V>> ZIP<T, U, V>(IEnumerable<T> xs, IEnumerable<U> ys, IEnumerable<V> zs) {
        using (var eX = xs.GetEnumerator())
        using (var eY = ys.GetEnumerator())
        using (var eZ = zs.GetEnumerator()) {
            while (eX.MoveNext() && eY.MoveNext() && eZ.MoveNext()) {
                yield return new Tuple<T, U, V>(eX.Current, eY.Current, eZ.Current);
            }
        }
    }
    public static IEnumerable<T> CONCAT<T>(IEnumerable<T> xs, IEnumerable<T> ys) => Enumerable.Concat(xs, ys);
}
static class Extension {
    public static void Rep(this int a, Action<int> f) => FOR(0, a, 1, f);
    public static void Rep(this int a, int n, Action<int> f) => FOR(0, a, n, f);
    public static void RepEQ(this int a, Action<int> f) => FOR(0, a + 1, 1, f);
    public static void RepEQ(this int a, int n, Action<int> f) => FOR(0, a + 1, n, f);
    public static void Prt<T>(this T x) => WriteLine(x);
    public static void Prt<T>(this IEnumerable<T> xs) => xs.Iter(x => WriteLine(x));
    public static void Prt_<T>(this IEnumerable<T> xs) {
        xs.Iter(x => Write($"{x} "));
        WriteLine();
    }
    public static void yn(this bool f, string y = "yes", string n = "no") => WriteLine(f ? y : n);
    public static void Yn(this bool f) => f.yn("Yes", "No");
    public static void YN(this bool f) => f.yn("YES", "NO");
    public static bool IsOdd(this int x) => x % 2 != 0;
    public static bool IsOdd(this long x) => x % 2 != 0;
}
static class LinqExtension {
    public struct IndexedValue<T> {
        public int Index;
        public T Value;
        public IndexedValue(int index, T value) {
            this.Index = index;
            this.Value = value;
        }
        public override string ToString() {
            return string.Format("Index: {0}, Value: {1}", Index, Value);
        }
    }
    public static IEnumerable<IndexedValue<T>> Indexed<T>(this IEnumerable<T> source) {
        return source.Select((value, index) => new IndexedValue<T>(index, value));
    }
    public static void Iter<T>(this IEnumerable<T> source, Action<T> action) {
        foreach (var s in source) action(s);
    }
    private static IEnumerable<T> Init<T>(int size, Func<int, T> f) {
        for (var i = 0; i < size; ++i) yield return f(i);
    }
    public static IEnumerable<IEnumerable<T>> Windowed<T>(this IEnumerable<T> source, int size) {
        var tmpArr = new T[size];
        var r = size - 1;
        var i = 0;
        using (var e = source.GetEnumerator()) {
            while (e.MoveNext()) {
                tmpArr[i] = e.Current;
                i = (i + 1) % size;
                if (r == 0) yield return Init<T>(size, j => tmpArr[(i + j) % size]);
                else r--;
            }
        }
    }
    public static IEnumerable<T> Sort<T>(this IEnumerable<T> source) => source.OrderBy(x => x);
    public static IEnumerable<T> Rev<T>(this IEnumerable<T> source) => Sort(source).Reverse();
    public static IEnumerable<T> DistinctBy<T, U>(this IEnumerable<T> source, Func<T, U> groupBy, Func<IGrouping<U, T>, T> selectBy)
        => source.GroupBy(groupBy).Select(selectBy);
    public static IEnumerable<T> DistinctBy<T, U>(this IEnumerable<T> source, Func<T, U> groupBy) => source.DistinctBy(groupBy, x => x.First());
    public static Dictionary<T, int> Counted<T>(this IEnumerable<T> source) {
        var d = new Dictionary<T, int>();
        foreach (var x in source) {
            if (!d.ContainsKey(x)) d[x] = 0;
            d[x]++;
        }
        return d;
    }
    public static IEnumerable<T> ValueSortedKey<T, U>(this Dictionary<T, U> source, bool isInc = true)
        => (isInc ? (source.OrderBy(kp => kp.Value)) : (source.OrderByDescending(kp => kp.Value))).ThenBy(kp => kp.Key).Select(kp => kp.Key);
}