/*package whatever //do not write package name here */

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



public class Main {
	public static void main (String[] args)throws IOException {
// 		System.out.println("GfG!");
// Scanner sc = new Scanner(System.in);
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String s[]= br.readLine().split(" ");

long  n= Long.parseLong(s[0]);
long a=Long.parseLong(s[1]);
long b= Long.parseLong(s[2]);
if(a==0 && b==0){
    System.out.println(0);
}
else{
long sum= a+b;
sum=n%sum;
if(sum>a)
sum=a;

long x= n/(a+b);

System.out.println(x*a+sum);
}
	}
}
/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