When I was in the fourth grade, I wanted to do what no other kid had done before: multiply together two really huge numbers.
My task was daunting, my obstacles numerous. For both my multiplier and multiplicand, I chose the number 777,777,777,777. My reasoning made sense: I wanted to practice writing out multiplication by hand and working on my sevens. I wasn’t doing this project for school, and I wasn’t getting any reward. I simply wanted to flex my mathematical skills as best as I could.
I failed many times along the way. Carrying the wrong remainder, adding up the totals incorrectly, not giving myself enough room on the paper. Eventually, though, I succeeded. The answer? 604,938,271,603,728,395,061,729. (I wish I had memorized it.) And the byproduct of my product? A tight grasp on my multiples of seven and a sincere appreciation for the existence of calculators.
Mob Psycho 100 does not deal with huge numbers, but that one hundred in the title signifies that it cares about digits to at least some extent.