Nothing Surprises Me Any More

So I'm in the van, driving to knit night, just getting ready to exit the freeway, when my cell phone rings.

"Hi, Mom, you might not know this off the top of your head, but is 130 divided by 7 sixteen or seventeen?"

I actually tried to do the math in my head, while changing a couple of lanes.

"You're right. I don't know off the top of my head and I can't figure it out while I'm driving. Is Daddy there?"

"Yes."

"Why don't you check with him? He's better at doing math in his head."

"Ok. See you later."