#include <iostream>

int main()
{
    long long a, b, c;
    std::cin >> a >> b >> c;
    
    long long mul = (a - 1) + b;
    
    long long ret = (c / mul) * a;
    ret += c - (ret * mul);
    
    std::cout << ret << std::endl;
    
    return 0;
}