import java.util.*;

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();
        
    if(a>n){
      System.out.println(n);
      return;
    }
    
    long o = n/(a+b);
    o = o*a;
    long nokori = n % (a+b);

    
    if(nokori >=a)
      o += a;
    else
      o += nokori;
      
    System.out.println(o);
  }
}
/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