I'm wondering what is a decent free or cheap calculator app for Windows 10, that allows me to type in and edit previous calculations in a freeform notepad style, e.g.
10 + 29.99 + 5.2 - 18 = 27.19
427 - 34.50 = 392.5
And better yet, allows note taking in with the calculations.
Bonus points for any natural language handling, unit and currency conversion, etc :-) Though I'd settle for something much simpler.