import java.util.*;
import java.io.*; 

public class Main {
	
	public static void main(String... string) {
		Scanner sc = new Scanner(System.in); 
		long n = sc.nextLong();
		long blue = sc.nextLong();
		long red = sc.nextLong();
		long ans = n/(red+blue) * blue; 
		long y = n%(red+blue); 
	    System.out.println(ans + Math.min(blue, y)); 
	}
}
/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