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

public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str;
		try {
			str = br.readLine();

			double r = Double.valueOf(str);

			double round = r*2*Math.PI;
			double area = r*r*Math.PI;

			DecimalFormat df = new DecimalFormat("0.000000");
			System.out.println(df.format(area) + " " + df.format(round));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.text.DecimalFormat; DecimalFormat java.text public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str;
		try {
			str = br.readLine();

			double r = Double.valueOf(str);

			double round = r*2*Math.PI;
			double area = r*r*Math.PI;

			DecimalFormat df = new DecimalFormat("0.000000");
			System.out.println(df.format(area) + " " + df.format(round));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
} Main public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str;
		try {
			str = br.readLine();

			double r = Double.valueOf(str);

			double round = r*2*Math.PI;
			double area = r*r*Math.PI;

			DecimalFormat df = new DecimalFormat("0.000000");
			System.out.println(df.format(area) + " " + df.format(round));
		} catch (IOException e) {
			e.printStackTrace();
		}
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str;
		try {
			str = br.readLine();

			double r = Double.valueOf(str);

			double round = r*2*Math.PI;
			double area = r*r*Math.PI;

			DecimalFormat df = new DecimalFormat("0.000000");
			System.out.println(df.format(area) + " " + df.format(round));
		} catch (IOException e) {
			e.printStackTrace();
		}
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str; str try {
			str = br.readLine();

			double r = Double.valueOf(str);

			double round = r*2*Math.PI;
			double area = r*r*Math.PI;

			DecimalFormat df = new DecimalFormat("0.000000");
			System.out.println(df.format(area) + " " + df.format(round));
		} catch (IOException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} IOException e {
			e.printStackTrace();
		} e.printStackTrace() e.printStackTrace e {
			str = br.readLine();

			double r = Double.valueOf(str);

			double round = r*2*Math.PI;
			double area = r*r*Math.PI;

			DecimalFormat df = new DecimalFormat("0.000000");
			System.out.println(df.format(area) + " " + df.format(round));
		} str = br.readLine() str br.readLine() br.readLine br double r = Double.valueOf(str); r Double.valueOf(str) Double.valueOf Double str double round = r*2*Math.PI; round r*2*Math.PI r*2*Math.PI r 2 Math.PI Math Math.PI double area = r*r*Math.PI; area r*r*Math.PI r*r*Math.PI r r Math.PI Math Math.PI DecimalFormat df = new DecimalFormat("0.000000"); df new DecimalFormat("0.000000") System.out.println(df.format(area) + " " + df.format(round)) System.out.println System.out System System.out df.format(area) + " " + df.format(round) df.format(area) + " " + df.format(round) df.format(area) df.format df area " " df.format(round) df.format df round String[] args args public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str;
		try {
			str = br.readLine();

			double r = Double.valueOf(str);

			double round = r*2*Math.PI;
			double area = r*r*Math.PI;

			DecimalFormat df = new DecimalFormat("0.000000");
			System.out.println(df.format(area) + " " + df.format(round));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
} public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str;
		try {
			str = br.readLine();

			double r = Double.valueOf(str);

			double round = r*2*Math.PI;
			double area = r*r*Math.PI;

			DecimalFormat df = new DecimalFormat("0.000000");
			System.out.println(df.format(area) + " " + df.format(round));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.DecimalFormat;

public class Main {

	public static void main(String[] args) {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str;
		try {
			str = br.readLine();

			double r = Double.valueOf(str);

			double round = r*2*Math.PI;
			double area = r*r*Math.PI;

			DecimalFormat df = new DecimalFormat("0.000000");
			System.out.println(df.format(area) + " " + df.format(round));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}