import java.util.Scanner;
public class Main {
   public static void main(String[] args){
     Scanner scanner = new Scanner(System.in);
     double r = scanner.nextDouble();
     double s=r*r*Math.PI;
     double c=2*r*Math.PI;
        System.out.print(String.format("%f", s));
         System.out.print(" ");
         System.out.print(String.format("%f", c));
   }   
}
/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