Put the cake at the bottom of the cake box. The cake should be no more than 8 inches. Hold the cake lightly with your left hand and hold the saw knife with your right hand. The knife moves in balance on the edge of the box. The handle should not touch the edge of the cake box, so as not to affect the advance of the saw knife.

Like this, I divided the cake into four pieces? …

Eight inches is not as good as six inches. This is 8 inches.

This one is 6 inches, and the one smaller than 8 inches is the best.

This is an 8-inch round cake box.