Calculator
noun
An electricity table is a calculator. Why is this? You can think about it in a couple of different ways. Maybe in the past, a calculator (aka abacus) would take up a whole table, making this "electric" version a calculator. Or, maybe it can be used to solve tables. Wrong kind of table, but should help you to remember the meaning of this word.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
頼むから電卓を叩くのをやめてくれ。気が狂いそうになるだろ！
Please stop drumming on the calculator. You’re driving me crazy!