TL;DR
An ingame calculator to stop the alt-tabing.What ?
An ingame calculator for simple calculations (+, -, *, /). It can be a simple GUI but i would be happy with a chat based thing.And with the upcoming "Rich & interactive text" (fff-237): it could magicly change into the answer or give the answer as a reply.
Or have a GUI
Why ?
When you try to calculate something, the usual way is to 1) alt-tab 2) make a calculation 3) alt-tab 4) look for the next number 5) alt-tab 6) make a calculation 7) alt-tabit would be a lot shorter if there weren't any alt-tabs.
i know of the mod Calculator for Factorio. but i don't have all the achievements (yet)