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: Accepted)

#include <stdio.h>
#include <stdint.h>

int getNumsInt32(int32_t *buf, int32_t num)
{
  int32_t i;

  for (i = 0; i < num; i++) {
    if (scanf("%d", &buf[i]) == EOF) {
      return -1;
    }
  }
  return 0;
}

int main()
{
  int32_t val[3];
  float time;
  int32_t ans;

  if (getNumsInt32((int32_t *)val, (int32_t)3) == -1) {
    return -1;
  }

  time = (float)val[2] + (float)0.5;

  ans = ((uint32_t)(time / val[0])) * val[1];

  printf("%d\n", ans);

  return 0;
}