/*==========================================================================*/
/*
    auther:    Dev1ce
    created:   09.04.2024 18:38:35
*/
/*--------------------------------------------------------------------------*/

#include<bits/stdc++.h>

using namespace std;


int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int a, b, x;
	cin >> a >> b >> x;
	cout << (x + a - 1) / a * b << '\n';
	return 0;	
}