import java.math.BigDecimal;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();

		BigDecimal r = new BigDecimal(s);
		BigDecimal p = new BigDecimal(Math.PI);

		BigDecimal a = new BigDecimal(0);
		BigDecimal b = new BigDecimal(0);
		BigDecimal c = new BigDecimal(2);
		
		a = p.multiply(r).multiply(r);
		b = p.multiply(r).multiply(c);
		
		a = a.setScale(6, BigDecimal.ROUND_UP);
		b = b.setScale(6, BigDecimal.ROUND_UP);

		System.out.print(a);
		System.out.print(" ");
		System.out.println(b);
	}

} import java.math.BigDecimal; BigDecimal java.math import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();

		BigDecimal r = new BigDecimal(s);
		BigDecimal p = new BigDecimal(Math.PI);

		BigDecimal a = new BigDecimal(0);
		BigDecimal b = new BigDecimal(0);
		BigDecimal c = new BigDecimal(2);
		
		a = p.multiply(r).multiply(r);
		b = p.multiply(r).multiply(c);
		
		a = a.setScale(6, BigDecimal.ROUND_UP);
		b = b.setScale(6, BigDecimal.ROUND_UP);

		System.out.print(a);
		System.out.print(" ");
		System.out.println(b);
	}

} Main public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();

		BigDecimal r = new BigDecimal(s);
		BigDecimal p = new BigDecimal(Math.PI);

		BigDecimal a = new BigDecimal(0);
		BigDecimal b = new BigDecimal(0);
		BigDecimal c = new BigDecimal(2);
		
		a = p.multiply(r).multiply(r);
		b = p.multiply(r).multiply(c);
		
		a = a.setScale(6, BigDecimal.ROUND_UP);
		b = b.setScale(6, BigDecimal.ROUND_UP);

		System.out.print(a);
		System.out.print(" ");
		System.out.println(b);
	} main {
		// TODO ?????????????????????????????????????????????

		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();

		BigDecimal r = new BigDecimal(s);
		BigDecimal p = new BigDecimal(Math.PI);

		BigDecimal a = new BigDecimal(0);
		BigDecimal b = new BigDecimal(0);
		BigDecimal c = new BigDecimal(2);
		
		a = p.multiply(r).multiply(r);
		b = p.multiply(r).multiply(c);
		
		a = a.setScale(6, BigDecimal.ROUND_UP);
		b = b.setScale(6, BigDecimal.ROUND_UP);

		System.out.print(a);
		System.out.print(" ");
		System.out.println(b);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.nextLine(); s sc.nextLine() sc.nextLine sc BigDecimal r = new BigDecimal(s); r new BigDecimal(s) BigDecimal p = new BigDecimal(Math.PI); p new BigDecimal(Math.PI) BigDecimal a = new BigDecimal(0); a new BigDecimal(0) BigDecimal b = new BigDecimal(0); b new BigDecimal(0) BigDecimal c = new BigDecimal(2); c new BigDecimal(2) a = p.multiply(r).multiply(r) a p.multiply(r).multiply(r) p.multiply(r).multiply p.multiply(r) p.multiply p r r b = p.multiply(r).multiply(c) b p.multiply(r).multiply(c) p.multiply(r).multiply p.multiply(r) p.multiply p r c a = a.setScale(6, BigDecimal.ROUND_UP) a a.setScale(6, BigDecimal.ROUND_UP) a.setScale a 6 BigDecimal.ROUND_UP BigDecimal BigDecimal.ROUND_UP b = b.setScale(6, BigDecimal.ROUND_UP) b b.setScale(6, BigDecimal.ROUND_UP) b.setScale b 6 BigDecimal.ROUND_UP BigDecimal BigDecimal.ROUND_UP System.out.print(a) System.out.print System.out System System.out a System.out.print(" ") System.out.print System.out System System.out " " System.out.println(b) System.out.println System.out System System.out b String[] args args public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();

		BigDecimal r = new BigDecimal(s);
		BigDecimal p = new BigDecimal(Math.PI);

		BigDecimal a = new BigDecimal(0);
		BigDecimal b = new BigDecimal(0);
		BigDecimal c = new BigDecimal(2);
		
		a = p.multiply(r).multiply(r);
		b = p.multiply(r).multiply(c);
		
		a = a.setScale(6, BigDecimal.ROUND_UP);
		b = b.setScale(6, BigDecimal.ROUND_UP);

		System.out.print(a);
		System.out.print(" ");
		System.out.println(b);
	}

} public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();

		BigDecimal r = new BigDecimal(s);
		BigDecimal p = new BigDecimal(Math.PI);

		BigDecimal a = new BigDecimal(0);
		BigDecimal b = new BigDecimal(0);
		BigDecimal c = new BigDecimal(2);
		
		a = p.multiply(r).multiply(r);
		b = p.multiply(r).multiply(c);
		
		a = a.setScale(6, BigDecimal.ROUND_UP);
		b = b.setScale(6, BigDecimal.ROUND_UP);

		System.out.print(a);
		System.out.print(" ");
		System.out.println(b);
	}

} Main
import java.math.BigDecimal;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????

		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();

		BigDecimal r = new BigDecimal(s);
		BigDecimal p = new BigDecimal(Math.PI);

		BigDecimal a = new BigDecimal(0);
		BigDecimal b = new BigDecimal(0);
		BigDecimal c = new BigDecimal(2);
		
		a = p.multiply(r).multiply(r);
		b = p.multiply(r).multiply(c);
		
		a = a.setScale(6, BigDecimal.ROUND_UP);
		b = b.setScale(6, BigDecimal.ROUND_UP);

		System.out.print(a);
		System.out.print(" ");
		System.out.println(b);
	}

}