REI Search Bar Calculations

Finally got to merging this pretty small but impactful bug with the mod, sorry for taking too long I have no excuse other than being lazy and forgetful with it, sorry for the inconvenience.

Fixed division not working with the command /calc (thanks KdGaming for the fix, I probably wouldn't have fixed it if you hadn't done it yourself.) Updated the mod to state it works on version 1.21.11.

It probably works on 26.1 I can't test that until REI's developer updates his mod to 26.1.