import java.util.Scanner;

public class Main
{
	public static void main(String[] args) {
	    Scanner s = new Scanner(System.in);
        long n = s.nextLong();
        long a = s.nextLong();
        long b = s.nextLong();
        long rep = a * (n/(a+b)) + (n%(a+b) > a ? a : n%(a+b));
        System.out.println(rep);
	}
}
/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