#include<bits/stdc++.h>
using namespace std;
//#include<atcoder/all>
//using namespace atcoder;
using ll = long long;
#define rep(i,n) for(int i=0;i<(n);++i)

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int a,b,x;
    cin>>a>>b>>x;
    int ans = (x+a-1)/a;
    ans *= b;
    cout<<ans<<endl;
}