[fallat]

I know, but the problem with that is now each cell is essentially a calculator, and it only makes sense to store numbers, and even on small devices, dealing with spreadsheets isn't the greatest because of screen size. Building discipline also to record data like this just to review once in awhile sounds like a lot of work, vs just opening "L/100km.txt" and calculating. Heck, you could make the calculator program be able to open files where each line is a number and operate on that.