import java.util.Scanner;
import java.lang.Math;

class Main{

    public static void main(String[] args){

        Scanner scanner = new Scanner(System.in);
        long n = scanner.nextLong();
        long a = scanner.nextLong();
        long b = scanner.nextLong();
        scanner.close();

        long result1 = n/(a+b)*a;
        long result2 = n%(a+b);
        if(result2>=a){
            System.out.println(result1+a);
            return;
        }else{
            System.out.println(result1+result2);
            return;
        }

    }
}
/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