#include <bits/stdc++.h>
using namespace std;

long long a, b, c, upp, low, mid;

int main() {
	cin.tie(0);
	ios::sync_with_stdio(0);
	
	cin >> a >> b >> c;
	long long tmp = c / (b+1);	// tmp回(b+a-1)円をもらって、残りc-tmp*(b+a-1)回1円もらえばいい
	cout << tmp*a + (c-tmp*(b+a-1)) << "\n";
}