import java.util.Scanner;

 
public 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 rest = N % (A + B);
		long divide = Math.floorDiv(N, A + B);
		
		if(rest < A) {
			System.out.print(A * divide + rest);
		}else {
			System.out.print(A * divide + A);
		}
		sc.close();
	}
	
}
/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