#include <bits/stdc++.h>
using namespace std;
int main()
{
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    int A,B,X;
    cin >> A >> B >> X;
    if (X < A)
        cout << B << " " ;
    else
    {
        if (X % A == 0)
            cout << B * (X / A) ;
        else
            cout << B * (X / A + 1) ;
    }
    return 0;

}