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

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

public 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 area = r * r * Math.PI;
		double length = r * 2 * Math.PI;
		System.out.printf("%.6f", area);
		System.out.print(" ");
		System.out.printf("%.6f", length);
	}
}