#include <cassert>
#include <iostream>
using namespace std;

int main() {
    int a, b, x;
    cin >> a >> b >> x;
    assert(1 <= a && a <= 1000);
    assert(1 <= b && b <= 1000);
    assert(1 <= x && x <= 1000);

    int set = (x + a - 1) / a;
    int ans = b * set;
    cout << ans << endl;
    return 0;
}