import java.io.File;
import java.io.IOException;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import java.util.Scanner;

 
/*
 * メモ
 * Scanner:nextは空白か改行までの単語
 * String[][] c = new String[h][w];
 * TemplateMain,"template_input.txt"
 * 0.5 == 1.0/2
 * Integer.valueOf(char)はダメ、(String)
 */
 
public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		double r = sc.nextDouble();
		
		System.out.printf("%.6f %.6f", (Math.PI*r*r), (Math.PI*2*r));
	}
} import java.io.File; File java.io import java.io.IOException; IOException java.io import java.util.ArrayDeque; ArrayDeque java.util import java.util.ArrayList; ArrayList java.util import java.util.Deque; Deque java.util import java.util.Scanner; Scanner java.util public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		double r = sc.nextDouble();
		
		System.out.printf("%.6f %.6f", (Math.PI*r*r), (Math.PI*2*r));
	}
} Main public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		double r = sc.nextDouble();
		
		System.out.printf("%.6f %.6f", (Math.PI*r*r), (Math.PI*2*r));
	} main {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		double r = sc.nextDouble();
		
		System.out.printf("%.6f %.6f", (Math.PI*r*r), (Math.PI*2*r));
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) double r = sc.nextDouble(); r sc.nextDouble() sc.nextDouble sc System.out.printf("%.6f %.6f", (Math.PI*r*r), (Math.PI*2*r)) System.out.printf System.out System System.out "%.6f %.6f" (Math.PI*r*r) Math.PI*r*r Math.PI Math Math.PI r r (Math.PI*2*r) Math.PI*2*r Math.PI Math Math.PI 2 r String[] args args public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		double r = sc.nextDouble();
		
		System.out.printf("%.6f %.6f", (Math.PI*r*r), (Math.PI*2*r));
	}
} public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		double r = sc.nextDouble();
		
		System.out.printf("%.6f %.6f", (Math.PI*r*r), (Math.PI*2*r));
	}
} Main
import java.io.File;
import java.io.IOException;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import java.util.Scanner;

 
/*
 * メモ
 * Scanner:nextは空白か改行までの単語
 * String[][] c = new String[h][w];
 * TemplateMain,"template_input.txt"
 * 0.5 == 1.0/2
 * Integer.valueOf(char)はダメ、(String)
 */
 
public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		Scanner sc = new Scanner(System.in);
		
		double r = sc.nextDouble();
		
		System.out.printf("%.6f %.6f", (Math.PI*r*r), (Math.PI*2*r));
	}
}
