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;

namespace ABC125
{
    class Program
    {
        static void Main(string[] args)
        {
			// 文字列の区切りの読み込み
			string[] inputs = Console.ReadLine().Split(' ');
			// 配列外参照の書き方
			if (inputs.Length < 3)
			{
				Console.WriteLine("wrong input.");
				return;
			}
			// 文字列から数値への変換
			int A = int.Parse(inputs[0]);
			int B = int.Parse(inputs[1]);
			int T = int.Parse(inputs[2]);
			// 計算
			int ans = B * (T / A);// T/Aは切り下げになるので、これでよい
			// 結果出力
			Console.WriteLine(ans);
        }
    }
}