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;
using System.Text;
using System.Threading.Tasks;

namespace ABC20190427
{
    class Program
    {
        static void Main(string[] args)
        {
            //Sample();
            Biscuit();
            //Console.ReadLine();
            //Biscuit();
            //Console.ReadLine();
            //Biscuit();
            //Console.ReadLine();
        }

        static void Biscuit()
        {
            // A B T
            string[] input = Console.ReadLine().Split(' ');
            int span = int.Parse(input[0]);
            int biscuitPerSpan = int.Parse(input[1]);
            int time = int.Parse(input[2]);

            int spanCount = time / span;
            int result = biscuitPerSpan * spanCount;
            
            //出力
            Console.WriteLine(result);
        }


        static void Sample()
        {
            // 整数の入力
            int a = int.Parse(Console.ReadLine());

            // スペース区切りの整数の入力
            string[] input = Console.ReadLine().Split(' ');
            int b = int.Parse(input[0]);
            int c = int.Parse(input[1]);

            // 文字列の入力
            string s = Console.ReadLine();

            //出力
            Console.WriteLine((a + b + c) + " " + s);
        }
    }
}