those round screens on the Enterprise, you wouldn't be wrong. -L
It's fascinating to remember what the future looked like from the past.
If spok didn't need a calculator, then what about the rest of the crew?
Your spock 'mentat' machine was pretty close future predicting.
That kind of device would have been awesome for Bones. Although they gave him the tricoder and the wireless sensor. Then the tricoder, became the stock analytical focus thing for the crew to check out the environments and beings on new planets.
I suspect that the latest incarntion of those boxen is the steam decks, irl.
I prefer those over tablets, because they have real tactile controls, instead of pretend buttons and controls used on tablets. I might add that I have no idea what a steam deck is, other than what I see on hacker fiction sites.
However, the producers/creaters didn't know then, what I know now.