#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int64_t A, B, C;
  cin >> A >> B >> C;
  int64_t D = A - 1 + B;
  int64_t x = C / D;
  cout << x * A + (C - x * D) << '\n';
  return 0;
}