import java.util.*;
 
public class Main {
  
  public static void main(String[] args){
    
  Scanner s=new Scanner(System.in);
    
  Long S=s.nextLong();
  Long A=s.nextLong();
  Long B=s.nextLong();
  
  Long division=S/(A+B);
  Long remainder=S%(A+B);
  
  Long count;
    
  if(remainder<A) count=division*A+remainder;
  else count=division*A+A;
    
  System.out.print(count);
  }
}

/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