Well, personally speaking, I'm paid to hand code; LLMs have not reached the quality of my code output yet and I'm seeing no pressure at all to use LLMs.
Relatedly, I work on an open source project where the constraining resource is review (as it is in most open source projects.) The current state is that LLM generated code is incredibly hard and annoying to review and there is a lot of pushback.
So, I'm going to wait and see.
(...especially since there's also legal challenges to LLMs trained on open source code with no regard to its licenses.)
Long division is a pretty simple algorithm that you can easily and quickly relearn if needed even your LLM of choice can likely explain that to you given there's plenty of writing about it in books and on the internet.
It is all about money and power
Aka pub and mass control (/propagande)
Another good reason to avoid getting raped by AI (but nothing related to the topic at hand (code))