import java.util.*;
import java.io.*;
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 div=n/(a+b);
            long rem=n%(a+b);
            
            long sum=div*a;
            sum+=Math.min(rem,a);
            System.out.println(sum);


    }
}
/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