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

public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		double r = Double.parseDouble(scan.nextLine());
		double dbCir = (Math.PI * r * 2.0);
		double dbArea = (Math.PI * r * r);
		BigDecimal x = new BigDecimal(dbCir);
		BigDecimal y = new BigDecimal(dbArea);
		x = x.setScale(6, BigDecimal.ROUND_HALF_UP);
		y = y.setScale(6, BigDecimal.ROUND_HALF_UP);

		System.out.println(y + " " + x);
		scan.close();
	}
} import java.math.BigDecimal; BigDecimal java.math import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		double r = Double.parseDouble(scan.nextLine());
		double dbCir = (Math.PI * r * 2.0);
		double dbArea = (Math.PI * r * r);
		BigDecimal x = new BigDecimal(dbCir);
		BigDecimal y = new BigDecimal(dbArea);
		x = x.setScale(6, BigDecimal.ROUND_HALF_UP);
		y = y.setScale(6, BigDecimal.ROUND_HALF_UP);

		System.out.println(y + " " + x);
		scan.close();
	}
} Main public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		double r = Double.parseDouble(scan.nextLine());
		double dbCir = (Math.PI * r * 2.0);
		double dbArea = (Math.PI * r * r);
		BigDecimal x = new BigDecimal(dbCir);
		BigDecimal y = new BigDecimal(dbArea);
		x = x.setScale(6, BigDecimal.ROUND_HALF_UP);
		y = y.setScale(6, BigDecimal.ROUND_HALF_UP);

		System.out.println(y + " " + x);
		scan.close();
	} main {
		Scanner scan = new Scanner(System.in);
		double r = Double.parseDouble(scan.nextLine());
		double dbCir = (Math.PI * r * 2.0);
		double dbArea = (Math.PI * r * r);
		BigDecimal x = new BigDecimal(dbCir);
		BigDecimal y = new BigDecimal(dbArea);
		x = x.setScale(6, BigDecimal.ROUND_HALF_UP);
		y = y.setScale(6, BigDecimal.ROUND_HALF_UP);

		System.out.println(y + " " + x);
		scan.close();
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) double r = Double.parseDouble(scan.nextLine()); r Double.parseDouble(scan.nextLine()) Double.parseDouble Double scan.nextLine() scan.nextLine scan double dbCir = (Math.PI * r * 2.0); dbCir (Math.PI * r * 2.0) Math.PI * r * 2.0 Math.PI Math Math.PI r 2.0 double dbArea = (Math.PI * r * r); dbArea (Math.PI * r * r) Math.PI * r * r Math.PI Math Math.PI r r BigDecimal x = new BigDecimal(dbCir); x new BigDecimal(dbCir) BigDecimal y = new BigDecimal(dbArea); y new BigDecimal(dbArea) x = x.setScale(6, BigDecimal.ROUND_HALF_UP) x x.setScale(6, BigDecimal.ROUND_HALF_UP) x.setScale x 6 BigDecimal.ROUND_HALF_UP BigDecimal BigDecimal.ROUND_HALF_UP y = y.setScale(6, BigDecimal.ROUND_HALF_UP) y y.setScale(6, BigDecimal.ROUND_HALF_UP) y.setScale y 6 BigDecimal.ROUND_HALF_UP BigDecimal BigDecimal.ROUND_HALF_UP System.out.println(y + " " + x) System.out.println System.out System System.out y + " " + x y + " " + x y " " x scan.close() scan.close scan String[] args args public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		double r = Double.parseDouble(scan.nextLine());
		double dbCir = (Math.PI * r * 2.0);
		double dbArea = (Math.PI * r * r);
		BigDecimal x = new BigDecimal(dbCir);
		BigDecimal y = new BigDecimal(dbArea);
		x = x.setScale(6, BigDecimal.ROUND_HALF_UP);
		y = y.setScale(6, BigDecimal.ROUND_HALF_UP);

		System.out.println(y + " " + x);
		scan.close();
	}
} public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		double r = Double.parseDouble(scan.nextLine());
		double dbCir = (Math.PI * r * 2.0);
		double dbArea = (Math.PI * r * r);
		BigDecimal x = new BigDecimal(dbCir);
		BigDecimal y = new BigDecimal(dbArea);
		x = x.setScale(6, BigDecimal.ROUND_HALF_UP);
		y = y.setScale(6, BigDecimal.ROUND_HALF_UP);

		System.out.println(y + " " + x);
		scan.close();
	}
} Main
import java.math.BigDecimal;
import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner scan = new Scanner(System.in);
		double r = Double.parseDouble(scan.nextLine());
		double dbCir = (Math.PI * r * 2.0);
		double dbArea = (Math.PI * r * r);
		BigDecimal x = new BigDecimal(dbCir);
		BigDecimal y = new BigDecimal(dbArea);
		x = x.setScale(6, BigDecimal.ROUND_HALF_UP);
		y = y.setScale(6, BigDecimal.ROUND_HALF_UP);

		System.out.println(y + " " + x);
		scan.close();
	}
}