import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		
		Scanner n=new Scanner(System.in);
		double a=n.nextDouble();
		double b=a*a*Math.PI;
		double c=a*2*Math.PI;
		System.out.printf("%.6f %.6f",b,c);
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		
		Scanner n=new Scanner(System.in);
		double a=n.nextDouble();
		double b=a*a*Math.PI;
		double c=a*2*Math.PI;
		System.out.printf("%.6f %.6f",b,c);
	}
} Main public static void main(String[] args) {
		
		Scanner n=new Scanner(System.in);
		double a=n.nextDouble();
		double b=a*a*Math.PI;
		double c=a*2*Math.PI;
		System.out.printf("%.6f %.6f",b,c);
	} main {
		
		Scanner n=new Scanner(System.in);
		double a=n.nextDouble();
		double b=a*a*Math.PI;
		double c=a*2*Math.PI;
		System.out.printf("%.6f %.6f",b,c);
	} Scanner n=new Scanner(System.in); n new Scanner(System.in) double a=n.nextDouble(); a n.nextDouble() n.nextDouble n double b=a*a*Math.PI; b a*a*Math.PI a*a*Math.PI a a Math.PI Math Math.PI double c=a*2*Math.PI; c a*2*Math.PI a*2*Math.PI a 2 Math.PI Math Math.PI System.out.printf("%.6f %.6f",b,c) System.out.printf System.out System System.out "%.6f %.6f" b c String[] args args public class Main {

	public static void main(String[] args) {
		
		Scanner n=new Scanner(System.in);
		double a=n.nextDouble();
		double b=a*a*Math.PI;
		double c=a*2*Math.PI;
		System.out.printf("%.6f %.6f",b,c);
	}
} public class Main {

	public static void main(String[] args) {
		
		Scanner n=new Scanner(System.in);
		double a=n.nextDouble();
		double b=a*a*Math.PI;
		double c=a*2*Math.PI;
		System.out.printf("%.6f %.6f",b,c);
	}
} Main
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		
		Scanner n=new Scanner(System.in);
		double a=n.nextDouble();
		double b=a*a*Math.PI;
		double c=a*2*Math.PI;
		System.out.printf("%.6f %.6f",b,c);
	}
}