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 (Clang 3.8.0) (judge verdict: Wrong Answer)

#include<stdio.h>
int main()
{
    int A;
    int B;
    int T;
    int F;


    scanf("%d %d %d", &A, &B, &T);
    if(A < 1 || A > 20){
            scanf("%d %d %d", &A, &B, &T);
        }
    if(B < 1 || B > 20){
            scanf("%d %d %d", &A, &B, &T);
        }
    if(T < 1 || T > 20){
            scanf("%d %d %d", &A, &B, &T);
        }
    F = (T+0.5) / A;
    if(A > 2*((T+0.5)/3) ){
        printf("0 \n");
        }else{
        printf("%d",B * T / A);
        }
        return 0;
    }