import java.util.Scanner;

public class Main {


	public static void main(String[] args) {

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

		long r = a * (n / (a+b));
		long k = n % (a+b);
		r += (  k < a ? k : a  );

		System.out.println(r);
	}

}

/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