One mode that my calculator had, which I found pretty useful for my poor brain to work with, was that it could be set to only work in e-6, e-3, e3, e6, e9, and so on. That is, instead of formatting numbers to be "1.239e5", it said "123.9e3". The advantage of that was that "e3" is kilo/thousands, "e6" is Mega/millions, and so on. Just like you're often more used to work with a specific numeric system of base 10, I think you're also usually more used to work with these prefixes.