import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());
		double surface = r * r * Math.PI;
		double length = 2 * r * Math.PI;
		System.out.printf("%.6f %.6f", surface, length);
	}

} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());
		double surface = r * r * Math.PI;
		double length = 2 * r * Math.PI;
		System.out.printf("%.6f %.6f", surface, length);
	}

} Main public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());
		double surface = r * r * Math.PI;
		double length = 2 * r * Math.PI;
		System.out.printf("%.6f %.6f", surface, length);
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());
		double surface = r * r * Math.PI;
		double length = 2 * r * Math.PI;
		System.out.printf("%.6f %.6f", surface, length);
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) double r = Double.parseDouble(br.readLine()); r Double.parseDouble(br.readLine()) Double.parseDouble Double br.readLine() br.readLine br double surface = r * r * Math.PI; surface r * r * Math.PI r * r * Math.PI r r Math.PI Math Math.PI double length = 2 * r * Math.PI; length 2 * r * Math.PI 2 * r * Math.PI 2 r Math.PI Math Math.PI System.out.printf("%.6f %.6f", surface, length) System.out.printf System.out System System.out "%.6f %.6f" surface length String[] args args public class Main {

	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());
		double surface = r * r * Math.PI;
		double length = 2 * r * Math.PI;
		System.out.printf("%.6f %.6f", surface, length);
	}

} public class Main {

	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());
		double surface = r * r * Math.PI;
		double length = 2 * r * Math.PI;
		System.out.printf("%.6f %.6f", surface, length);
	}

} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());
		double surface = r * r * Math.PI;
		double length = 2 * r * Math.PI;
		System.out.printf("%.6f %.6f", surface, length);
	}

}