Problem:
Score : 100 points

Problem Statement

A biscuit making machine produces B biscuits at the following moments: A seconds, 2A seconds, 3A seconds and each subsequent multiple of A seconds after activation.

Find the total number of biscuits produced within T + 0.5 seconds after activation.

Constraints

All values in input are integers.

1 \leq A, B, T \leq 20

Input

Input is given from Standard Input in the following format:

A B T

Output

Print the total number of biscuits produced within T + 0.5 seconds after activation.

Sample Input 1

3 5 7

Sample Output 1

10

Five biscuits will be produced three seconds after activation.

Another five biscuits will be produced six seconds after activation.

Thus, a total of ten biscuits will be produced within 7.5 seconds after activation.

Sample Input 2

3 2 9

Sample Output 2

6

Sample Input 3

20 20 19

Sample Output 3

0

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

using System;
using System.Collections.Generic;
using System.Linq;

class Program{

  static double ans;
  static double work;
  static int a, b, t;

  static int Main() {

    string[] nyu = Console.ReadLine().Split(' ');
    a = int.Parse(nyu[0]);
    b = int.Parse(nyu[1]);
    t = int.Parse(nyu[2]);

    // ここまで入力

    work = (t + 0.5)/a;
    ans = (int)work * b;

    Console.WriteLine("{0}", ans);

    return 0;
  }

}