Introduction - If you have any usage issues, please Google them yourself
This multi-function calculator with simple arithmetic operations, seeking logX, y th lnX, x, and successive subtraction
Multiplication and division, the divisor is 0 error 1: "E1" over 8 data bits, error 2: "E2" when the need to retain three decimal places, if the integer part of the result exceeds the number of bits that can be displayed display error
Error 3: "E3" and some other functions.