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 ans = (N / (A+B)) * A;
		long rem =  N % (A + B) > A ? A: N%(A + B);

		System.out.println(ans + rem);

	}
}

/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