import java.util.Scanner;

class Main {

  public static void main(String[] args) {
    new Main().run();
  }

  private Scanner sc = new Scanner(System.in);

  private void run() {
    long N = sc.nextLong();
    long A = sc.nextLong();
    long B = sc.nextLong();

    long aSet = N / (A + B) * A;
    long mod = N % (A + B);

    System.out.println(aSet + Math.min(mod, A));
  }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz