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

class Main{

	public static void main(String[] args) throws IOException{

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());

		double circle_area = r * r * Math.PI;
		double circle_len = r * 2 * Math.PI;

		System.out.printf("%.6f %.6f", circle_area, circle_len);

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

	public static void main(String[] args) throws IOException{

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());

		double circle_area = r * r * Math.PI;
		double circle_len = r * 2 * Math.PI;

		System.out.printf("%.6f %.6f", circle_area, circle_len);

	}
} Main public static void main(String[] args) throws IOException{

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());

		double circle_area = r * r * Math.PI;
		double circle_len = r * 2 * Math.PI;

		System.out.printf("%.6f %.6f", circle_area, circle_len);

	} main {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());

		double circle_area = r * r * Math.PI;
		double circle_len = r * 2 * Math.PI;

		System.out.printf("%.6f %.6f", circle_area, circle_len);

	} 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 circle_area = r * r * Math.PI; circle_area r * r * Math.PI r * r * Math.PI r r Math.PI Math Math.PI double circle_len = r * 2 * Math.PI; circle_len r * 2 * Math.PI r * 2 * Math.PI r 2 Math.PI Math Math.PI System.out.printf("%.6f %.6f", circle_area, circle_len) System.out.printf System.out System System.out "%.6f %.6f" circle_area circle_len String[] args args
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

class Main{

	public static void main(String[] args) throws IOException{

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());

		double circle_area = r * r * Math.PI;
		double circle_len = r * 2 * Math.PI;

		System.out.printf("%.6f %.6f", circle_area, circle_len);

	}
}