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

/**
 *
 */

/**
 * @author cthanh
 *
 */
public class Main{

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO ?????????????????????????????????????????????
		 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));// ??\?????????
		    String str = br.readLine();
		    double r =  Double.parseDouble( str);
		    double men = (double) r *r *Math.PI;
		    double syu = (double) r*2* Math.PI;
		   // System.out.println(Math.PI);
		    System.out.printf( "%.6f %.6f",men , syu );


	}

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

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO ?????????????????????????????????????????????
		 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));// ??\?????????
		    String str = br.readLine();
		    double r =  Double.parseDouble( str);
		    double men = (double) r *r *Math.PI;
		    double syu = (double) r*2* Math.PI;
		   // System.out.println(Math.PI);
		    System.out.printf( "%.6f %.6f",men , syu );


	}

} Main /**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO ?????????????????????????????????????????????
		 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));// ??\?????????
		    String str = br.readLine();
		    double r =  Double.parseDouble( str);
		    double men = (double) r *r *Math.PI;
		    double syu = (double) r*2* Math.PI;
		   // System.out.println(Math.PI);
		    System.out.printf( "%.6f %.6f",men , syu );


	} main {
		// TODO ?????????????????????????????????????????????
		 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));// ??\?????????
		    String str = br.readLine();
		    double r =  Double.parseDouble( str);
		    double men = (double) r *r *Math.PI;
		    double syu = (double) r*2* Math.PI;
		   // System.out.println(Math.PI);
		    System.out.printf( "%.6f %.6f",men , syu );


	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str = br.readLine(); str br.readLine() br.readLine br double r =  Double.parseDouble( str); r Double.parseDouble( str) Double.parseDouble Double str double men = (double) r *r *Math.PI; men (double) r *r *Math.PI (double) r *r *Math.PI (double) r r Math.PI Math Math.PI double syu = (double) r*2* Math.PI; syu (double) r*2* Math.PI (double) r*2* Math.PI (double) r 2 Math.PI Math Math.PI System.out.printf( "%.6f %.6f",men , syu ) System.out.printf System.out System System.out "%.6f %.6f" men syu String[] args args public class Main{

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO ?????????????????????????????????????????????
		 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));// ??\?????????
		    String str = br.readLine();
		    double r =  Double.parseDouble( str);
		    double men = (double) r *r *Math.PI;
		    double syu = (double) r*2* Math.PI;
		   // System.out.println(Math.PI);
		    System.out.printf( "%.6f %.6f",men , syu );


	}

} public class Main{

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO ?????????????????????????????????????????????
		 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));// ??\?????????
		    String str = br.readLine();
		    double r =  Double.parseDouble( str);
		    double men = (double) r *r *Math.PI;
		    double syu = (double) r*2* Math.PI;
		   // System.out.println(Math.PI);
		    System.out.printf( "%.6f %.6f",men , syu );


	}

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

/**
 *
 */

/**
 * @author cthanh
 *
 */
public class Main{

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {
		// TODO ?????????????????????????????????????????????
		 BufferedReader br = new BufferedReader(new InputStreamReader(System.in));// ??\?????????
		    String str = br.readLine();
		    double r =  Double.parseDouble( str);
		    double men = (double) r *r *Math.PI;
		    double syu = (double) r*2* Math.PI;
		   // System.out.println(Math.PI);
		    System.out.printf( "%.6f %.6f",men , syu );


	}

}