#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
const ll INF=9e18;

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