#include <iostream>
#include <string>
#include <vector>
#include <utility>
using namespace std;
int main(void){
  long long a,b,c;
  cin >> a >> b >> c;
  long long x;
  x = (c/(a+b-1))*a + c%(a+b-1);
  cout << x << "\n";
  return 0;
}