Round cakes are cut in circles from outer edge of cake.
Move in 2 inch and cut a circle. Cut 1 inch slices from that circle.
Continue until cake is completely cut.
The core of the cake is served as 1 slice on 6 inch, 10 inch, 14 inch layers.
The core of the cake is cut into 8 pieces on 8 inch, 12 inch, 16 inch layers.