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

public class Main {
    public static void main (String[] args) throws IOException {
        double r,x,y;
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder builder = new StringBuilder();
        String data = reader.readLine();
        r = Double.parseDouble(data);

        x = r * r * Math.PI;
        y = 2 * r * Math.PI;
        
        builder
           .append(String.format("%.6f",x))
           .append(" ")
           .append(String.format("%.6f",y));
        System.out.println(builder);        
    }
} 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) throws IOException {
        double r,x,y;
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder builder = new StringBuilder();
        String data = reader.readLine();
        r = Double.parseDouble(data);

        x = r * r * Math.PI;
        y = 2 * r * Math.PI;
        
        builder
           .append(String.format("%.6f",x))
           .append(" ")
           .append(String.format("%.6f",y));
        System.out.println(builder);        
    }
} Main public static void main (String[] args) throws IOException {
        double r,x,y;
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder builder = new StringBuilder();
        String data = reader.readLine();
        r = Double.parseDouble(data);

        x = r * r * Math.PI;
        y = 2 * r * Math.PI;
        
        builder
           .append(String.format("%.6f",x))
           .append(" ")
           .append(String.format("%.6f",y));
        System.out.println(builder);        
    } main {
        double r,x,y;
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder builder = new StringBuilder();
        String data = reader.readLine();
        r = Double.parseDouble(data);

        x = r * r * Math.PI;
        y = 2 * r * Math.PI;
        
        builder
           .append(String.format("%.6f",x))
           .append(" ")
           .append(String.format("%.6f",y));
        System.out.println(builder);        
    } double r r x x y; y BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); reader new BufferedReader(new InputStreamReader(System.in)) StringBuilder builder = new StringBuilder(); builder new StringBuilder() String data = reader.readLine(); data reader.readLine() reader.readLine reader r = Double.parseDouble(data) r Double.parseDouble(data) Double.parseDouble Double data x = r * r * Math.PI x r * r * Math.PI r * r * Math.PI r r Math.PI Math Math.PI y = 2 * r * Math.PI y 2 * r * Math.PI 2 * r * Math.PI 2 r Math.PI Math Math.PI builder
           .append(String.format("%.6f",x))
           .append(" ")
           .append(String.format("%.6f",y)) builder
           .append(String.format("%.6f",x))
           .append(" ")
           .append builder
           .append(String.format("%.6f",x))
           .append(" ") builder
           .append(String.format("%.6f",x))
           .append builder
           .append(String.format("%.6f",x)) builder
           .append builder String.format("%.6f",x) String.format String "%.6f" x " " String.format("%.6f",y) String.format String "%.6f" y System.out.println(builder) System.out.println System.out System System.out builder String[] args args public class Main {
    public static void main (String[] args) throws IOException {
        double r,x,y;
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder builder = new StringBuilder();
        String data = reader.readLine();
        r = Double.parseDouble(data);

        x = r * r * Math.PI;
        y = 2 * r * Math.PI;
        
        builder
           .append(String.format("%.6f",x))
           .append(" ")
           .append(String.format("%.6f",y));
        System.out.println(builder);        
    }
} public class Main {
    public static void main (String[] args) throws IOException {
        double r,x,y;
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder builder = new StringBuilder();
        String data = reader.readLine();
        r = Double.parseDouble(data);

        x = r * r * Math.PI;
        y = 2 * r * Math.PI;
        
        builder
           .append(String.format("%.6f",x))
           .append(" ")
           .append(String.format("%.6f",y));
        System.out.println(builder);        
    }
} Main

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

public class Main {
    public static void main (String[] args) throws IOException {
        double r,x,y;
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder builder = new StringBuilder();
        String data = reader.readLine();
        r = Double.parseDouble(data);

        x = r * r * Math.PI;
        y = 2 * r * Math.PI;
        
        builder
           .append(String.format("%.6f",x))
           .append(" ")
           .append(String.format("%.6f",y));
        System.out.println(builder);        
    }
}