import java.util.*;

public class Main {
public static void main(String[] args) {
		
		Scanner keyboard = new Scanner(System.in); 
		
		long N= keyboard.nextLong();
		long A = keyboard.nextLong();
		long B = keyboard.nextLong();
		
		long ans = 0;
		
		if(N%(A+B) == 0) {
			ans = N/(A+B)*A;
		}else if(N%(A+B) <= A) {
			ans = N/(A+B)*A+N%(A+B);
		}else{
			ans = N/(A+B)*A+A;
		}
		
		System.out.print(ans);
		keyboard.close();	
		
	}
}

/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