#include <iostream>

using namespace std;
int main(void){
    long long A,B,C;
    cin >> A >> B >> C;  
        long long remain,block,length;
        if(A < 10)
        {
        block = (A - 1) + B;
        remain  = C % block;
            if(A > remain)
            {
            cout << (C / block) * A + remain;
            }
            else
            {
                cout << (C / block) * A + A;
            }
        }
        else
        {
        block = C / (A - 1 + B);
        length = block * A;
        remain  = C - length - (B - 1) * block;
            if(A > remain)
            {
            cout << length  + remain;
            }
            else
            {
                cout << length  + A;
            }
        }
}