This is a simple calculator. - It supports a mini calculator on any screen. - It supports arithmetic expressions such as +, -, x, ÷, /, (, ). - It supports percent operation and memory buttons. - It supports a scientific calculator. - It supports digit grouping separator(comma, space, Apostrophe) - It supports digit grouping method (987,654,321.012 or 9,8765,4321.012 or 98,76,54,321.012) - It supports the calculation history. [Percent operation] 100x3%=3 (3% of 100) [Memory buttons] M+ : mem