You don't have to ask that specific person. Open a new question, point at the answer you linked and ask about the specific bit you want to understand.
Re:Confessions of a Reddit Karma Whore
by antisemiotic on Sunday June 02, 2019 @05:47AM
(#20074472)
Now I feel stupid for not thinking of this obvious solution, thanks!
Speaking of which, could someone with enough internet points on Math SE ask this guy https://math.stackexchange.com/a/35238 how does he deal with carries during multiplication? I made an account specifically to ask this, but I'm not a mathematician and don't have enough expertise to answer questions asked there (or perhaps I'm too lazy to hunt for questions that I could answer).