Tools/raw materials: an effective calculator.

1. Press shift first, and then release. At this time, a small S will appear in the upper left corner of the display.

2. Press the AC key to release it, and you can turn it off.

Function of calculator

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. They have integrated circuit chips, but the structure is much simpler than that of computers. They can be said to be the first generation of weak electronic computers, but they are more convenient and cheaper. They can be widely used in business transactions and are one of the necessary office supplies.

In addition to displaying the calculation results, there are often overflow instructions. The calculator is powered by an AC converter or a battery, which can be charged by an AC converter or a solar converter. Calculator is generally composed of arithmetic unit, controller, memory, keyboard, display, power supply and some optional peripheral devices and electronic accessories, and is composed of manual or mechanical equipment.

The arithmetic unit and controller of low-level calculator realize simple serial operation through digital logic circuit, and its random access memory has only one or two units for accumulation storage. High-end calculator consists of microprocessor and read-only memory, and has many random storage units to store input programs and data.