I was struck last week by the realization that I hadn’t done long division in decades. When the Casio FX (can’t remember which; it was small and solar) hit my life, the need to do long division vanished. So it’s probably around 30 years since I last had to do it.
My first attempts to remember how were dismal. Then I remembered the whole bit about “bringing down the units”, and it all clicked. I made the following animation to show how I did it:
This might be a slightly odd way of doing it, but it’s the way we were taught.