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;
    long r = c - (c / (a - 1 + b)) * (a - 1 + b);
    if(r <= (a - 1)) {
      ans += r;
    } else {
      ans += a;
    }
    System.out.println(ans);
  }
}