import java.util.Scanner;

public class Main{

  public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    double pi = Math.PI;
    double r = scanner.nextDouble();
    double area = area(r);
    double length = length(r);
    System.out.printf("%f %f", area, length);
  }

  public static double area(double r){
    double pi = Math.PI;
    return r * r * pi;
  }

  public static double length(double r){
    double pi = Math.PI;
    return 2 * pi * r;
  }
}
/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