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