#include <iostream>

using namespace std;
int main(void){
    auto start = clock();
    long long A,B,C;
    scanf("%d%d%d",&A,&B,&C);
    long long block,remain;
    block = (A - 1) + B;
    remain  = C % block;
    
    if(remain == 0)
    {
       cout << (C / block) * A;
    }
    else
    {
        cout << (C / block) * A + remain;
    }
}