import java.io.*;

public class Main{
    public static void main(String[]args) throws NumberFormatException, IOException {
     
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String[]str= br.readLine().split(" ");
        double a = Double.parseDouble(str[0]);
        
        double circumference  = 2*a*Math.PI;
        double area = a*a*Math.PI;
        System.out.printf("%.6f %.6f",  area, circumference);
    }
} import java.io.*; io.* java public class Main{
    public static void main(String[]args) throws NumberFormatException, IOException {
     
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String[]str= br.readLine().split(" ");
        double a = Double.parseDouble(str[0]);
        
        double circumference  = 2*a*Math.PI;
        double area = a*a*Math.PI;
        System.out.printf("%.6f %.6f",  area, circumference);
    }
} Main public static void main(String[]args) throws NumberFormatException, IOException {
     
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String[]str= br.readLine().split(" ");
        double a = Double.parseDouble(str[0]);
        
        double circumference  = 2*a*Math.PI;
        double area = a*a*Math.PI;
        System.out.printf("%.6f %.6f",  area, circumference);
    } main {
     
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String[]str= br.readLine().split(" ");
        double a = Double.parseDouble(str[0]);
        
        double circumference  = 2*a*Math.PI;
        double area = a*a*Math.PI;
        System.out.printf("%.6f %.6f",  area, circumference);
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String[]str= br.readLine().split(" "); str br.readLine().split(" ") br.readLine().split br.readLine() br.readLine br " " double a = Double.parseDouble(str[0]); a Double.parseDouble(str[0]) Double.parseDouble Double str[0] str 0 double circumference  = 2*a*Math.PI; circumference 2*a*Math.PI 2*a*Math.PI 2 a Math.PI Math Math.PI double area = a*a*Math.PI; area a*a*Math.PI a*a*Math.PI a a Math.PI Math Math.PI System.out.printf("%.6f %.6f",  area, circumference) System.out.printf System.out System System.out "%.6f %.6f" area circumference String[]args args public class Main{
    public static void main(String[]args) throws NumberFormatException, IOException {
     
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String[]str= br.readLine().split(" ");
        double a = Double.parseDouble(str[0]);
        
        double circumference  = 2*a*Math.PI;
        double area = a*a*Math.PI;
        System.out.printf("%.6f %.6f",  area, circumference);
    }
} public class Main{
    public static void main(String[]args) throws NumberFormatException, IOException {
     
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String[]str= br.readLine().split(" ");
        double a = Double.parseDouble(str[0]);
        
        double circumference  = 2*a*Math.PI;
        double area = a*a*Math.PI;
        System.out.printf("%.6f %.6f",  area, circumference);
    }
} Main
import java.io.*;

public class Main{
    public static void main(String[]args) throws NumberFormatException, IOException {
     
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String[]str= br.readLine().split(" ");
        double a = Double.parseDouble(str[0]);
        
        double circumference  = 2*a*Math.PI;
        double area = a*a*Math.PI;
        System.out.printf("%.6f %.6f",  area, circumference);
    }
}