She worked it out with a pencil.
Pencil-vania.
Because he is an erascist.
4:30pm It let's you out of work a bit early with a valid excuse
He derives!
They don't believe in higher powers.
He works it out with a pencil! =
Gee I'm a tree!
He worked it out with a pencil.
The same way he solved all other problems: He worked it out with a pencil and paper.