import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long N = Long.parseLong(sc.next());
		long A = Long.parseLong(sc.next());
		long B = Long.parseLong(sc.next());
		sc.close();
		
		long block = A + B;
		long loop = N / block;
		long rest = N % block;
		if(A <= rest) {
			long ans = loop * A + A;
			System.out.println(ans);
			return;
		}else {
			long ans = loop * A + rest;
			System.out.println(ans);
			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