Homework

import java.util.Scanner;
class Main {

  public static void main(String[] args) {
    Scanner scan=new scenner(System.in);
    double r= scan.nextDouble();
    double area=3.14*r*r;
    double per=3.14*2*r;
    System.out.println(area);
     System.out.println(per);

  }
}