[Suggestion] in-game Calculator

[RafikiCZ]

Title self-explanatory Is there an in-game calculator? Like, there is kind of a lot of math in the game (yes, basic math, but still math). I find myself constantly Alt-Tabing on the Windows calculator, and it's a little bit annoying. 

If not, implementing it like an actual item (something like a build planner or plummer) would be nice (maybe immersion-breaking since we play as robots and he shouldn't have a problem with basic math) or just a classic HUD option. 

Also, notes could be useful or some kind of custom checkpopint list. My memory sucks, and having a written plan for what I wanted to do is priceless for me.

[Laaaaggertha]

Would like this also

[Cain]

+1