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 a1 = n/(a+b)*a;
			long a2;
			long c = n%(a+b);
			if(c<=a) {
				a2 =c;	
			}else {
				a2 =a;
			}
			
			if(a==0) {
				System.out.println(0);
			}else {
				System.out.println(a1+a2);
			}
			
			
		}

	}
/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