A cow-culator. haha haha ha... ok, I'll leave.
He heard they were getting hares and lost interest!
You get laid the same amount of times but the dishes start to pile up. Hey now!
An udder failure.
Any kind of moosic you like!
Carry the Juan
An engi-near!
You use a cow-culator. Or you round them up. Or any other method the commenters want.
A cow-culator! (Cue groans)