import java.util.*;
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 m =N/(A+B);
    long n=N%(A+B);
    if(n<A){System.out.println(m*A+n);}
    else{System.out.println((m+1)*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