Turn on the calculator switch and press the number 8 key, then press the+key and then press the 6 key in the four operations. Press the equal sign key and the number 14 will be displayed on the screen.

Calculator is an electronic machine invented by modern people that can perform digital operations. Modern electronic calculator is a hand-held electronic machine that can perform mathematical operations. It has an integrated circuit chip, but its structure is much simpler than that of a computer. It can be said that it is the first generation of electronic computers with weak functions, but it is more convenient and cheaper. It can be widely used in business transactions and is one of the necessary office supplies.