I am asking a question here that seems to be ridiculous. I'm just letting everyone know I am aware of this is advance. (How does Ubuntu not come with a functional calculator???)
For Ubuntu 16.04.
I am looking for a basic calculator that has "M+" "MC" "MR" "+/-" and a Clear button (the first three are memory). I prefer that it doesn't have you type in your formula, but rather does a "*" when you press the button, but I will accept that if there aren't other options. I'm not interested in calculators that require documentation to use (you have to know what "Ctrl-X does, which you can't learn from the calculators menus).
You can skip the rest of this if you don't want more details.
I have tried gcalc, calculator, gnome-calculate, and Qalculate!. The last one lets you save a variable, which you have to name (cumbersome), but I have no idea how to find the variable later - "history" doesn't show stored variable names, and there are no other buttons to try. The variable "A" comes predefined??? I'm not going to read the documentation for it, as I hate the interface, it's formula based, doesn't have a clear button, and for other reasons. I have no idea why the developers of the first three calculators think their products are functional without having a memory.