They work it out with a pencil.
Because he is an erascist.
They both only really work on paper
A two-knee fish! (works better when you're drunk)
They know how to work under the hood!
They get a pencil and work it out.
He worked it out with a pencil.
How does a mathematician cure her constipation She works it out with a pencil.
Squash one and deal with the other later.
He just shakes it off.