Well, between those two, you shouldn't have any problem with leftovers.

[Conspiratorially, leaning forward, he recommends:] But you might want to hide any cake that's going to be for midnight snacks, just in case.

And that gives me an idea! [His smile brightens a little.] For your next math lesson, would you like to work on how to scale a recipe to serve a bigger or smaller group?

[Fractions, multiplication, division and possibly a cake, considering that the school still has a working kitchen he's managed to keep the clinic from taking over full-time. He should see if he can wrangle Goten into that lesson too.]