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

		double s = r*r*Math.PI;
		double l = 2*r*Math.PI;
		System.out.printf("%6f %6f",s,l);
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		double r = Double.parseDouble(br.readLine());

		double s = r*r*Math.PI;
		double l = 2*r*Math.PI;
		System.out.printf("%6f %6f",s,l);
	} 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 s = r*r*Math.PI; s r*r*Math.PI r*r*Math.PI r r Math.PI Math Math.PI double l = 2*r*Math.PI; l 2*r*Math.PI 2*r*Math.PI 2 r Math.PI Math Math.PI System.out.printf("%6f %6f",s,l) System.out.printf System.out System System.out "%6f %6f" s l 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 s = r*r*Math.PI;
		double l = 2*r*Math.PI;
		System.out.printf("%6f %6f",s,l);
	}
} 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 s = r*r*Math.PI;
		double l = 2*r*Math.PI;
		System.out.printf("%6f %6f",s,l);
	}
} 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 s = r*r*Math.PI;
		double l = 2*r*Math.PI;
		System.out.printf("%6f %6f",s,l);
	}
}