Review calculations in UI

[tloffler]

Comment from Alex at https://aboutcircles.com/t/tutorial-how-to-convert-crc-into-tradable-group-currency/490:

Great! It works perfectly fine, just the calculation is not nice, I would prefer having the 1:3 calculation done in the UI correctly already.

But for all other things it works really fine, I just had a hiccup with the safe balance display (took ~1min after the trx was finished). And I only worked through 6a, haven’t tried the Exit for now