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

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        double r = Double.parseDouble(br.readLine());
        double L = 2.0 * r * Math.PI;
        double S = r * r * Math.PI;
        
        System.out.printf("%.6f " , S);
        System.out.printf("%.6f\n" , L);
    }
} import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.io.BufferedReader; BufferedReader java.io public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        double r = Double.parseDouble(br.readLine());
        double L = 2.0 * r * Math.PI;
        double S = r * r * Math.PI;
        
        System.out.printf("%.6f " , S);
        System.out.printf("%.6f\n" , L);
    }
} Main public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        double r = Double.parseDouble(br.readLine());
        double L = 2.0 * r * Math.PI;
        double S = r * r * Math.PI;
        
        System.out.printf("%.6f " , S);
        System.out.printf("%.6f\n" , L);
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        double r = Double.parseDouble(br.readLine());
        double L = 2.0 * r * Math.PI;
        double S = r * r * Math.PI;
        
        System.out.printf("%.6f " , S);
        System.out.printf("%.6f\n" , L);
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) double r = Double.parseDouble(br.readLine()); r Double.parseDouble(br.readLine()) Double.parseDouble Double br.readLine() br.readLine br double L = 2.0 * r * Math.PI; L 2.0 * r * Math.PI 2.0 * r * Math.PI 2.0 r Math.PI Math Math.PI double S = r * r * Math.PI; S r * r * Math.PI r * r * Math.PI r r Math.PI Math Math.PI System.out.printf("%.6f " , S) System.out.printf System.out System System.out "%.6f " S System.out.printf("%.6f\n" , L) System.out.printf System.out System System.out "%.6f\n" L String[] args args public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        double r = Double.parseDouble(br.readLine());
        double L = 2.0 * r * Math.PI;
        double S = r * r * Math.PI;
        
        System.out.printf("%.6f " , S);
        System.out.printf("%.6f\n" , L);
    }
} public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        double r = Double.parseDouble(br.readLine());
        double L = 2.0 * r * Math.PI;
        double S = r * r * Math.PI;
        
        System.out.printf("%.6f " , S);
        System.out.printf("%.6f\n" , L);
    }
} Main
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.BufferedReader;

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        double r = Double.parseDouble(br.readLine());
        double L = 2.0 * r * Math.PI;
        double S = r * r * Math.PI;
        
        System.out.printf("%.6f " , S);
        System.out.printf("%.6f\n" , L);
    }
}