import java.util.Scanner;

class Main{
  public static void main(String[] args) {
    
	  Scanner sc = new Scanner(System.in);
	  
	  double r = sc.nextDouble();
	  double ritu = Math.PI;
	  double men = 0;
	  double shuu = 0;
	  
	  //String  = String.format("%.5f", );
	  men = r*r*ritu;
	  shuu = 2 * ritu * r;
	  
	  String strmen = String.format("%.6f",men );
	  String strshuu = String.format("%.6f",shuu );
	  
	  System.out.println(strmen+" "+strshuu);
  }
}
/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