/* -*- coding: utf-8 -*-
 *
 * 2706.cc:  No.2706 One Nafmo - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* main */

int main() {
  int a, b, x;
  scanf("%d%d%d", &a, &b, &x);

  int p = (x + a - 1) / a * b;
  printf("%d\n", p);
  
  return 0;
}