import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);
		long N = Long.parseLong(scan.next());
		long A = Long.parseLong(scan.next());
		long B = Long.parseLong(scan.next());
		scan.close();

		long total = A + B;

		long shou = N / total;
		long amari = N % total;

		long AA = shou * A;
		if (amari <= A) {
			AA += amari;
		} else {
			AA += A;
		}

		System.out.println(AA);

	}

}
/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