import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long  N = sc.nextLong();
		long  A = sc.nextLong();
		long  B = sc.nextLong();
		long p = A + B;
		
		if(N%p <= A) {
			System.out.println(N/p*A + N%p);
		}else {
			System.out.println(N/p*A + A);
		}


	}
}

/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