import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long N = sc.nextLong();
    long A = sc.nextLong();
    long B = sc.nextLong();
    long C = N/(A+B);
    long D = N%(A+B);
    
    if(A==0){
      System.out.println(0);
    } else if(D<=A) {
      System.out.println(C*A+D);
    } else if(D>A) {
      System.out.println(C*A+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