WorkArea.java
package shapes;

public class WorkArea {
    public static void main(String[] args) {
        SRectangle desk = new SRectangle(24,36);
        System.out.println("area of desk = " + desk.area());

        SRectangle book = new SRectangle(8.5,11);
        System.out.println("area of two books = " + 2*book.area());

        SCircle plate = new SCircle(8);
        System.out.println("area of three plates = " + 3*plate.area());

        SCircle glass = new SCircle(1.35);
        System.out.println("area of three glasses = " + 3*glass.area());

        SSquare coaster = glass.circumscribingSquare();
        System.out.println("area of three coasters = " + 3*coaster.area());


        double objects = (2*book.area() + 3*plate.area() + 3*coaster.area());
        System.out.println("the collective area of the objects = " + objects);
        double rest = (desk.area() - objects);
        System.out.println("the area of the desk not obscured by the objects = " + rest);
    }
}