#include <iostream>

using namespace std;
int main(void){
    long long A,B,C;
    cin >> A >> B >> C;
    long long block;
    block = (A - 1) + B;
    
    
    if(A == 1)
    {
        if(C % B == 0)
        {
        cout << C / B;
        }
        else
        {
            cout << C / B + 1;
        }
    }
    else
    {
        long long remain,block;
        block = (A - 1) + B;
        remain  = C % block;
        if(remain == 0)
        {
            cout << (C / block) * A;
        }
        else
        {
            cout << (C / block) * A + remain;
        }
    }
}