import java.util.Scanner;
import java.util.InputMismatchException;


class Main{
public static void main(String[] args){
Scanner scan =new Scanner(System.in);
try{
double r=scan.nextDouble();
double a=r*r*3.141592653589;
double b=r*2.00000000*3.141592653589;
System.out.printf("%f %f\n",a,b);
}catch (InputMismatchException e){
      System.out.println("?????????????????????" + e);
    }

}
} import java.util.Scanner; Scanner java.util import java.util.InputMismatchException; InputMismatchException java.util class Main{
public static void main(String[] args){
Scanner scan =new Scanner(System.in);
try{
double r=scan.nextDouble();
double a=r*r*3.141592653589;
double b=r*2.00000000*3.141592653589;
System.out.printf("%f %f\n",a,b);
}catch (InputMismatchException e){
      System.out.println("?????????????????????" + e);
    }

}
} Main public static void main(String[] args){
Scanner scan =new Scanner(System.in);
try{
double r=scan.nextDouble();
double a=r*r*3.141592653589;
double b=r*2.00000000*3.141592653589;
System.out.printf("%f %f\n",a,b);
}catch (InputMismatchException e){
      System.out.println("?????????????????????" + e);
    }

} main {
Scanner scan =new Scanner(System.in);
try{
double r=scan.nextDouble();
double a=r*r*3.141592653589;
double b=r*2.00000000*3.141592653589;
System.out.printf("%f %f\n",a,b);
}catch (InputMismatchException e){
      System.out.println("?????????????????????" + e);
    }

} Scanner scan =new Scanner(System.in); scan new Scanner(System.in) try{
double r=scan.nextDouble();
double a=r*r*3.141592653589;
double b=r*2.00000000*3.141592653589;
System.out.printf("%f %f\n",a,b);
}catch (InputMismatchException e){
      System.out.println("?????????????????????" + e);
    } catch (InputMismatchException e){
      System.out.println("?????????????????????" + e);
    } InputMismatchException e {
      System.out.println("?????????????????????" + e);
    } System.out.println("?????????????????????" + e) System.out.println System.out System System.out "?????????????????????" + e "?????????????????????" e {
double r=scan.nextDouble();
double a=r*r*3.141592653589;
double b=r*2.00000000*3.141592653589;
System.out.printf("%f %f\n",a,b);
} double r=scan.nextDouble(); r scan.nextDouble() scan.nextDouble scan double a=r*r*3.141592653589; a r*r*3.141592653589 r*r*3.141592653589 r r 3.141592653589 double b=r*2.00000000*3.141592653589; b r*2.00000000*3.141592653589 r*2.00000000*3.141592653589 r 2.00000000 3.141592653589 System.out.printf("%f %f\n",a,b) System.out.printf System.out System System.out "%f %f\n" a b String[] args args
import java.util.Scanner;
import java.util.InputMismatchException;


class Main{
public static void main(String[] args){
Scanner scan =new Scanner(System.in);
try{
double r=scan.nextDouble();
double a=r*r*3.141592653589;
double b=r*2.00000000*3.141592653589;
System.out.printf("%f %f\n",a,b);
}catch (InputMismatchException e){
      System.out.println("?????????????????????" + e);
    }

}
}