-is surprisingly good at doing long division/multiplication and equations mentally, he has a fast brain.

Now I wanna do a oneshot of this idea... or somehow get it in the main story that I haven't updated in like... 3 weeks to a month (I am so sorry for the people waiting on that!) I dunno. It just sounds kinda cool for Denki the class 1a 'idiot' (I'm sorry, ma child 😢) to actually be really good at math...