import java.util.Scanner;

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

    System.out.printf("%.6f %.6f\n", cal_area(r), cal_cirum(r));
  }

  private static double cal_cirum(double r) {
    return (r * 2 * Math.PI);
  }

  private static double cal_area(double r) {
    return (r * r * Math.PI);
  }
} import java.util.Scanner; Scanner java.util class Main {
  public static void main(String[] args){
    Scanner cin = new Scanner(System.in);
    double r = cin.nextDouble();

    System.out.printf("%.6f %.6f\n", cal_area(r), cal_cirum(r));
  }

  private static double cal_cirum(double r) {
    return (r * 2 * Math.PI);
  }

  private static double cal_area(double r) {
    return (r * r * Math.PI);
  }
} Main public static void main(String[] args){
    Scanner cin = new Scanner(System.in);
    double r = cin.nextDouble();

    System.out.printf("%.6f %.6f\n", cal_area(r), cal_cirum(r));
  } main {
    Scanner cin = new Scanner(System.in);
    double r = cin.nextDouble();

    System.out.printf("%.6f %.6f\n", cal_area(r), cal_cirum(r));
  } Scanner cin = new Scanner(System.in); cin new Scanner(System.in) double r = cin.nextDouble(); r cin.nextDouble() cin.nextDouble cin System.out.printf("%.6f %.6f\n", cal_area(r), cal_cirum(r)) System.out.printf System.out System System.out "%.6f %.6f\n" cal_area(r) cal_area r cal_cirum(r) cal_cirum r String[] args args private static double cal_cirum(double r) {
    return (r * 2 * Math.PI);
  } cal_cirum {
    return (r * 2 * Math.PI);
  } return (r * 2 * Math.PI); (r * 2 * Math.PI) r * 2 * Math.PI r 2 Math.PI Math Math.PI double r r private static double cal_area(double r) {
    return (r * r * Math.PI);
  } cal_area {
    return (r * r * Math.PI);
  } return (r * r * Math.PI); (r * r * Math.PI) r * r * Math.PI r r Math.PI Math Math.PI double r r
import java.util.Scanner;

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

    System.out.printf("%.6f %.6f\n", cal_area(r), cal_cirum(r));
  }

  private static double cal_cirum(double r) {
    return (r * 2 * Math.PI);
  }

  private static double cal_area(double r) {
    return (r * r * Math.PI);
  }
}