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

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        double r=Double.parseDouble(reader.readLine());
        Double area=r*r*Math.PI;
        Double circumference=r*2*Math.PI;
        System.out.println(String.format("%.6f %.6f", area, circumference));
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        double r=Double.parseDouble(reader.readLine());
        Double area=r*r*Math.PI;
        Double circumference=r*2*Math.PI;
        System.out.println(String.format("%.6f %.6f", area, circumference));
    }
} Main public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        double r=Double.parseDouble(reader.readLine());
        Double area=r*r*Math.PI;
        Double circumference=r*2*Math.PI;
        System.out.println(String.format("%.6f %.6f", area, circumference));
    } main {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        double r=Double.parseDouble(reader.readLine());
        Double area=r*r*Math.PI;
        Double circumference=r*2*Math.PI;
        System.out.println(String.format("%.6f %.6f", area, circumference));
    } BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); reader new BufferedReader(new InputStreamReader(System.in)) double r=Double.parseDouble(reader.readLine()); r Double.parseDouble(reader.readLine()) Double.parseDouble Double reader.readLine() reader.readLine reader Double area=r*r*Math.PI; area r*r*Math.PI r*r*Math.PI r r Math.PI Math Math.PI Double circumference=r*2*Math.PI; circumference r*2*Math.PI r*2*Math.PI r 2 Math.PI Math Math.PI System.out.println(String.format("%.6f %.6f", area, circumference)) System.out.println System.out System System.out String.format("%.6f %.6f", area, circumference) String.format String "%.6f %.6f" area circumference String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        double r=Double.parseDouble(reader.readLine());
        Double area=r*r*Math.PI;
        Double circumference=r*2*Math.PI;
        System.out.println(String.format("%.6f %.6f", area, circumference));
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        double r=Double.parseDouble(reader.readLine());
        Double area=r*r*Math.PI;
        Double circumference=r*2*Math.PI;
        System.out.println(String.format("%.6f %.6f", area, circumference));
    }
} Main
import java.io.BufferedReader;
import java.io.InputStreamReader;

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