

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 AB = A + B;

		long c = 0;

		if (N % AB > A) {
			c = A;
		} else {
			c = N % AB;
		}

		System.out.println(A * (N / AB) + c);

	}

}

/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