import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
	    double a = Double.parseDouble( scan.next());
	    double pi=Math.PI;
	    
	    double area = a * a * pi;
	    double length = 2 * a * pi;
	    
	    String ar = String.format("%f", area);
	    String l = String.format("%f", length);
	    
	    System.out.println(ar + " "+ l);
 
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
	    double a = Double.parseDouble( scan.next());
	    double pi=Math.PI;
	    
	    double area = a * a * pi;
	    double length = 2 * a * pi;
	    
	    String ar = String.format("%f", area);
	    String l = String.format("%f", length);
	    
	    System.out.println(ar + " "+ l);
 
	}
} Main public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
	    double a = Double.parseDouble( scan.next());
	    double pi=Math.PI;
	    
	    double area = a * a * pi;
	    double length = 2 * a * pi;
	    
	    String ar = String.format("%f", area);
	    String l = String.format("%f", length);
	    
	    System.out.println(ar + " "+ l);
 
	} main {
		Scanner scan = new Scanner(System.in);
	    double a = Double.parseDouble( scan.next());
	    double pi=Math.PI;
	    
	    double area = a * a * pi;
	    double length = 2 * a * pi;
	    
	    String ar = String.format("%f", area);
	    String l = String.format("%f", length);
	    
	    System.out.println(ar + " "+ l);
 
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) double a = Double.parseDouble( scan.next()); a Double.parseDouble( scan.next()) Double.parseDouble Double scan.next() scan.next scan double pi=Math.PI; pi Math.PI Math Math.PI double area = a * a * pi; area a * a * pi a * a * pi a a pi double length = 2 * a * pi; length 2 * a * pi 2 * a * pi 2 a pi String ar = String.format("%f", area); ar String.format("%f", area) String.format String "%f" area String l = String.format("%f", length); l String.format("%f", length) String.format String "%f" length System.out.println(ar + " "+ l) System.out.println System.out System System.out ar + " "+ l ar + " "+ l ar " " l String[] args args public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
	    double a = Double.parseDouble( scan.next());
	    double pi=Math.PI;
	    
	    double area = a * a * pi;
	    double length = 2 * a * pi;
	    
	    String ar = String.format("%f", area);
	    String l = String.format("%f", length);
	    
	    System.out.println(ar + " "+ l);
 
	}
} public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
	    double a = Double.parseDouble( scan.next());
	    double pi=Math.PI;
	    
	    double area = a * a * pi;
	    double length = 2 * a * pi;
	    
	    String ar = String.format("%f", area);
	    String l = String.format("%f", length);
	    
	    System.out.println(ar + " "+ l);
 
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
	    double a = Double.parseDouble( scan.next());
	    double pi=Math.PI;
	    
	    double area = a * a * pi;
	    double length = 2 * a * pi;
	    
	    String ar = String.format("%f", area);
	    String l = String.format("%f", length);
	    
	    System.out.println(ar + " "+ l);
 
	}
}