import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    long N = scan.nextLong();
    long A = scan.nextLong();
    long B = scan.nextLong();
    scan.close();

    long count = N / (A + B);
    long amari = N % (A + B);

    System.out.println(A * count + (A>=amari ? amari : 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