A useful object for those who are shit at maths. However, usually it is completely useless and is the perfect tool for getting someone's attention. All in all, it can be a weapon of maths (GET ITTTT? UB) destruction.
Person #1: OI
Person #2; -no response-
Person #1; -starts tapping person #2 with calculator with a cheesy grin-
Person #2; gtfo