A cow-culator. haha haha ha ... ok, I'll leave.
The officer hadn't read him his rights.
Because he's Snow'd-in!
You stop milking a cow after 10 years.
Because cows can't get a square meal.
Triggernometry
Trigger-nometry.
With a cow-culator! (Rimshot)
You use a cow-culator. Or you round them up. Or any other method the commenters want.