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

namespace Program
{
    static class Console_
    {
        private static Queue<string> param = new Queue<string>();
        public static int NextInt() => int.Parse(NextString());
        public static string NextString()
        {
            if (param.Count == 0) foreach (var item in Console.ReadLine().Split(' ')) param.Enqueue(item);
            return param.Dequeue();
        }
    }

    public class ABC125A
    {
        static public void Main(string[] args)
        {
            var A = Console_.NextInt();
            var B = Console_.NextInt();
            var T = Console_.NextInt();

            var bis = Math.Floor((T + 0.5) / A) * B;

            Console.WriteLine(bis);
        }
    }
}