import java.util.Scanner;

public class Main{
	public static void main(String[] args) {

		Scanner scanner = new Scanner(System.in);

		String[] temp = scanner.nextLine().split(" ");
		long n = Long.parseLong(temp[0]);
		long a = Long.parseLong(temp[1]);
		long b = Long.parseLong(temp[2]);

		double cnt = Math.floor(n / (double)(a + b));
		long ans = (long)cnt * b;


		long diff = n - (long)cnt * (a + b);

		ans += diff > a ? diff - a : 0;

		System.out.println(n - ans);


	}
}
/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