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 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <stdio.h>

int main(){
    int a, b, t, a_hoji, b_hoji;
    double t2;


    scanf("%d %d %d", &a, &b, &t);
    if( ((a|b|t)<1) | ((a|b|t)>20) )return 0;

    a_hoji = a;
    b_hoji = b;
    t2 = t+0.5;
    b=0;

    for(a = 0; t2 > a; a = a + a_hoji){
        b = b + b_hoji;
    }

    b = b - b_hoji;
    

    printf("%d",b);
    return 0;
}