import java.util.Scanner;
import java.math.*;


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

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner as = new Scanner(System.in);
		
	       
		double r,t,s;

	       
        
        r = as.nextDouble();
           
           
        s=3.141592653589*r*r;
        t=2.0*3.141592653589*r;
        
        BigDecimal ros = new BigDecimal(s);
        BigDecimal rot = new BigDecimal(t);
        
        ros=ros.setScale(6,BigDecimal.ROUND_HALF_UP);
        rot=rot.setScale(6,BigDecimal.ROUND_HALF_UP);

        System.out.println(ros+" "+rot);           


	}

} import java.util.Scanner; Scanner java.util import java.math.*; math.* java public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner as = new Scanner(System.in);
		
	       
		double r,t,s;

	       
        
        r = as.nextDouble();
           
           
        s=3.141592653589*r*r;
        t=2.0*3.141592653589*r;
        
        BigDecimal ros = new BigDecimal(s);
        BigDecimal rot = new BigDecimal(t);
        
        ros=ros.setScale(6,BigDecimal.ROUND_HALF_UP);
        rot=rot.setScale(6,BigDecimal.ROUND_HALF_UP);

        System.out.println(ros+" "+rot);           


	}

} Main /**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner as = new Scanner(System.in);
		
	       
		double r,t,s;

	       
        
        r = as.nextDouble();
           
           
        s=3.141592653589*r*r;
        t=2.0*3.141592653589*r;
        
        BigDecimal ros = new BigDecimal(s);
        BigDecimal rot = new BigDecimal(t);
        
        ros=ros.setScale(6,BigDecimal.ROUND_HALF_UP);
        rot=rot.setScale(6,BigDecimal.ROUND_HALF_UP);

        System.out.println(ros+" "+rot);           


	} main {
		// TODO Auto-generated method stub
		Scanner as = new Scanner(System.in);
		
	       
		double r,t,s;

	       
        
        r = as.nextDouble();
           
           
        s=3.141592653589*r*r;
        t=2.0*3.141592653589*r;
        
        BigDecimal ros = new BigDecimal(s);
        BigDecimal rot = new BigDecimal(t);
        
        ros=ros.setScale(6,BigDecimal.ROUND_HALF_UP);
        rot=rot.setScale(6,BigDecimal.ROUND_HALF_UP);

        System.out.println(ros+" "+rot);           


	} Scanner as = new Scanner(System.in); as new Scanner(System.in) double r r t t s; s r = as.nextDouble() r as.nextDouble() as.nextDouble as s=3.141592653589*r*r s 3.141592653589*r*r 3.141592653589*r*r 3.141592653589 r r t=2.0*3.141592653589*r t 2.0*3.141592653589*r 2.0*3.141592653589*r 2.0 3.141592653589 r BigDecimal ros = new BigDecimal(s); ros new BigDecimal(s) BigDecimal rot = new BigDecimal(t); rot new BigDecimal(t) ros=ros.setScale(6,BigDecimal.ROUND_HALF_UP) ros ros.setScale(6,BigDecimal.ROUND_HALF_UP) ros.setScale ros 6 BigDecimal.ROUND_HALF_UP BigDecimal BigDecimal.ROUND_HALF_UP rot=rot.setScale(6,BigDecimal.ROUND_HALF_UP) rot rot.setScale(6,BigDecimal.ROUND_HALF_UP) rot.setScale rot 6 BigDecimal.ROUND_HALF_UP BigDecimal BigDecimal.ROUND_HALF_UP System.out.println(ros+" "+rot) System.out.println System.out System System.out ros+" "+rot ros+" "+rot ros " " rot String[] args args public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner as = new Scanner(System.in);
		
	       
		double r,t,s;

	       
        
        r = as.nextDouble();
           
           
        s=3.141592653589*r*r;
        t=2.0*3.141592653589*r;
        
        BigDecimal ros = new BigDecimal(s);
        BigDecimal rot = new BigDecimal(t);
        
        ros=ros.setScale(6,BigDecimal.ROUND_HALF_UP);
        rot=rot.setScale(6,BigDecimal.ROUND_HALF_UP);

        System.out.println(ros+" "+rot);           


	}

} public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner as = new Scanner(System.in);
		
	       
		double r,t,s;

	       
        
        r = as.nextDouble();
           
           
        s=3.141592653589*r*r;
        t=2.0*3.141592653589*r;
        
        BigDecimal ros = new BigDecimal(s);
        BigDecimal rot = new BigDecimal(t);
        
        ros=ros.setScale(6,BigDecimal.ROUND_HALF_UP);
        rot=rot.setScale(6,BigDecimal.ROUND_HALF_UP);

        System.out.println(ros+" "+rot);           


	}

} Main
import java.util.Scanner;
import java.math.*;


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

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner as = new Scanner(System.in);
		
	       
		double r,t,s;

	       
        
        r = as.nextDouble();
           
           
        s=3.141592653589*r*r;
        t=2.0*3.141592653589*r;
        
        BigDecimal ros = new BigDecimal(s);
        BigDecimal rot = new BigDecimal(t);
        
        ros=ros.setScale(6,BigDecimal.ROUND_HALF_UP);
        rot=rot.setScale(6,BigDecimal.ROUND_HALF_UP);

        System.out.println(ros+" "+rot);           


	}

}