import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
 
class Main{
    public static void main(String[] args){
    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
    		BufferedReader br = new BufferedReader(isr);
    		String buf = br.readLine();
    		double r = Double.parseDouble(buf);
        
    		double pi = Math.PI;
        	double S = r * r * pi;
        	double R = 2 * r * pi;
        
        	System.out.printf("%f %f", S, R);
    	}catch (IOException e){
    		System.err.println(e);
        }
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io class Main{
    public static void main(String[] args){
    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
    		BufferedReader br = new BufferedReader(isr);
    		String buf = br.readLine();
    		double r = Double.parseDouble(buf);
        
    		double pi = Math.PI;
        	double S = r * r * pi;
        	double R = 2 * r * pi;
        
        	System.out.printf("%f %f", S, R);
    	}catch (IOException e){
    		System.err.println(e);
        }
    }
} Main public static void main(String[] args){
    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
    		BufferedReader br = new BufferedReader(isr);
    		String buf = br.readLine();
    		double r = Double.parseDouble(buf);
        
    		double pi = Math.PI;
        	double S = r * r * pi;
        	double R = 2 * r * pi;
        
        	System.out.printf("%f %f", S, R);
    	}catch (IOException e){
    		System.err.println(e);
        }
    } main {
    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
    		BufferedReader br = new BufferedReader(isr);
    		String buf = br.readLine();
    		double r = Double.parseDouble(buf);
        
    		double pi = Math.PI;
        	double S = r * r * pi;
        	double R = 2 * r * pi;
        
        	System.out.printf("%f %f", S, R);
    	}catch (IOException e){
    		System.err.println(e);
        }
    } try{
    		InputStreamReader isr = new InputStreamReader(System.in);
    		BufferedReader br = new BufferedReader(isr);
    		String buf = br.readLine();
    		double r = Double.parseDouble(buf);
        
    		double pi = Math.PI;
        	double S = r * r * pi;
        	double R = 2 * r * pi;
        
        	System.out.printf("%f %f", S, R);
    	}catch (IOException e){
    		System.err.println(e);
        } catch (IOException e){
    		System.err.println(e);
        } IOException e {
    		System.err.println(e);
        } System.err.println(e) System.err.println System.err System System.err e {
    		InputStreamReader isr = new InputStreamReader(System.in);
    		BufferedReader br = new BufferedReader(isr);
    		String buf = br.readLine();
    		double r = Double.parseDouble(buf);
        
    		double pi = Math.PI;
        	double S = r * r * pi;
        	double R = 2 * r * pi;
        
        	System.out.printf("%f %f", S, R);
    	} InputStreamReader isr = new InputStreamReader(System.in); isr new InputStreamReader(System.in) BufferedReader br = new BufferedReader(isr); br new BufferedReader(isr) String buf = br.readLine(); buf br.readLine() br.readLine br double r = Double.parseDouble(buf); r Double.parseDouble(buf) Double.parseDouble Double buf double pi = Math.PI; pi Math.PI Math Math.PI double S = r * r * pi; S r * r * pi r * r * pi r r pi double R = 2 * r * pi; R 2 * r * pi 2 * r * pi 2 r pi System.out.printf("%f %f", S, R) System.out.printf System.out System System.out "%f %f" S R String[] args args
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
 
class Main{
    public static void main(String[] args){
    	try{
    		InputStreamReader isr = new InputStreamReader(System.in);
    		BufferedReader br = new BufferedReader(isr);
    		String buf = br.readLine();
    		double r = Double.parseDouble(buf);
        
    		double pi = Math.PI;
        	double S = r * r * pi;
        	double R = 2 * r * pi;
        
        	System.out.printf("%f %f", S, R);
    	}catch (IOException e){
    		System.err.println(e);
        }
    }
}