import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long a = sc.nextLong();
    long b = sc.nextLong();
    long c = sc.nextLong();
    long ans = (c / (a - 1 + b)) * a;
    ans += (c - (c / (a - 1 + b)) * (a - 1 + b));
    System.out.println(ans);
  }
}