import java.util.Scanner;
public class Main {
  
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		
		long n = stdIn.nextLong();
		long a = stdIn.nextLong();
		long b = stdIn.nextLong();
		
		long c = a + b;
		
		long cnt = n / c;
		
		long ans = (n/(a+b))*a;
		
		long rem = n % (a+b);
		
		System.out.println(ans+Math.min(a,rem));
		
	}

}
/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