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


public 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);
	    	//面積 πr^2
	    	//円周 2πr
	    	System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*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 public 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);
	    	//面積 πr^2
	    	//円周 2πr
	    	System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*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);
	    	//面積 πr^2
	    	//円周 2πr
	    	System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*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);
	    	//面積 πr^2
	    	//円周 2πr
	    	System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*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);
	    	//面積 πr^2
	    	//円周 2πr
	    	System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*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);
	    	//面積 πr^2
	    	//円周 2πr
	    	System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*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 System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*r) System.out.printf System.out System System.out "%f %f" Math.PI*Math.pow(r, 2) Math.PI Math Math.PI Math.pow(r, 2) Math.pow Math r 2 Math.PI*2*r Math.PI*2*r Math.PI Math Math.PI 2 r String[] args args public 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);
	    	//面積 πr^2
	    	//円周 2πr
	    	System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*r);

    	} catch(IOException e) {
    		System.err.println(e);
		}
    }
} public 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);
	    	//面積 πr^2
	    	//円周 2πr
	    	System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*r);

    	} catch(IOException e) {
    		System.err.println(e);
		}
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


public 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);
	    	//面積 πr^2
	    	//円周 2πr
	    	System.out.printf("%f %f",Math.PI*Math.pow(r, 2),Math.PI*2*r);

    	} catch(IOException e) {
    		System.err.println(e);
		}
    }
}