A bakery offers a small circular cake with a diameter of 6 inches. It also offers a large circular cake with a diameter of 18 inches. Complete the explanation for whether the top of the large cake has three times the area of that of the small cake. The area of the top of the large cake is
π in2 and that of the small cake is
π in2. The top of the large cake has an area equal to
times that of the small cake.