Using Arch with KDE Plasma too. My only problem with KDE Plasma is that I just can’t stop customizing it. I find a couple of things that “I can do something to improve upon” and the next thing I know I’m tweaking things again!
Other than the odd problem with Wayland/XWayland or something, that I usually just make a mental note to investigate further, I’m pretty happy. Now if I can only stop myself from “making just one more little change…”
I’m using KCalc version 24.05.0 but I suppose it’s similar enough to your version.
I typed in the following in simple mode:
<value> * 10^-8
I even got results with the following:
<value>e-8
With pushing buttons in science mode I managed to replicate what you’ve observed, so I guess it’s indeed a bug? However, typing something like either of the two sequences above would give you the desired result.
As an aside, it seems like typing things directly into the input text box like
sin(30)
can be done in any mode. I don’t know if it can be generalized though, and I don’t know if all of the buttons in Science and Stat modes have a plaintext equivalent you can just type in.