It has a command line only mode.
I think it can also work in RPN
Its way more than I need.

#### wandering off topic #####
units is hours of fun

Also I dont think I'm alone in firing up python 
for some simple stuff. (which is all I need)

hmmm or most  interpreters actually.
Though watch out for divide by zero on some.

or even plain old bash:

ANS=$(( 2 * 2 ))
echo $ANS

oh and emacs of course it has a -few-  calcs
(someone had to say it)

I was looking for Orpie, when I found that it won't be anywhere.

Curious, is that there aren't much calculator that work on the terminal, with bc or dc to be the most used. But other alt?

would you know some very portable calculator into devuan, or some that can be compiled easily?

thank you