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

int main() {
	int64_t a, b, c;
	cin >> a >> b >> c;
	if (a == 1) {
		cout << a * (c / (a - 1 + b)) + c % (a - 1 + b) / b << endl;
		return 0;
	}
	cout << a * (c / (a - 1 + b)) + c % (a - 1 + b) << endl;
	return 0;
}