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

class Main { 
public static void main (String[] args){
  Scanner scan = new Scanner(System.in);

  double r = scan.nextDouble();
  double x = Math.PI;

  System.out.printf("%.5f %.5f\n",r * r * x,r * 2 * x);

}
}
/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