#include <bits/stdc++.h>
using namespace std;
int main()
{
#define taskname ""
    if (fopen(taskname ".inp", "r"))
    {
        freopen(taskname ".inp", "r", stdin);
        freopen(taskname ".out", "w", stdout);
    }
    cin.tie(0)->sync_with_stdio(0);
    int A,B,X;
    cin>>A>>B>>X;
    long long ans=(X+A-1)/A*B;

    return 0;
}