// Program 52: Radius and Area of a Circle Using Inheritance

import java.util.*;
class CircleBase
{
    double radius;
    void input()
    {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter radius: ");
        radius = sc.nextDouble();
    }
}
class CircleArea extends CircleBase
{
    void display()
    {
        double area = 3.14159 * radius * radius;
        System.out.printf("Radius = %.2f%nArea = %.2f%n", radius, area);
    }
    public static void main(String[] args)
    {
        CircleArea ob = new CircleArea();
        ob.input();
        ob.display();
    }
}