import java.util.*;
import java.io.*;
public class Main {
   public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
        long n = sc.nextLong();
        long a = sc.nextLong();
        long b = sc.nextLong();
        long temp = a+b;
        long temp1 = (n/temp) * a;
       if(n%temp != 0) { 
               if(n % temp >= a) {
                      temp1 += a;
               }
               else 
                       temp1 += (n % temp);
       }
       System.out.println(temp1);
   }
}
/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