import java.util.Scanner;
public class Main{
 public static void main(String[] args) {
   Scanner kbd = new Scanner(System.in);
   long n=kbd.nextLong();
   long a=kbd.nextLong();
   long b=kbd.nextLong();

   if(a==0){
     System.out.println(a);
   }else if(b==0){
     System.out.println(n);
   }else{
   long k=a+b;
   long x;
   if(n%k>a){
     x=a;
   }else{
     x=n%k;
   }
   System.out.println(n/k*a+x);
 }
}
}
/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