#include <bits/stdc++.h>
#ifdef LOCAL
#include "./debug.cpp"
#else
#define debug(...)
#define print_line
#endif
using namespace std;
using ll = long long;

int main() {
    ll A, B, X;
    cin >> A >> B >> X;
    cout << B * ((A + X - 1) / A) << endl;
}