import java.util.*;
//import java.util.stream.Collectors;

public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		long n = Long.parseLong(sc.next());
		long a = Long.parseLong(sc.next());
		long b = Long.parseLong(sc.next());
		System.out.println(n % (a + b) <= a ? n / (a + b) * a + n % (a + b) : n / (a + b) * 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