Calculator

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+ : memory + resultM- : memory - resultMR : memory returnMC : memory clearMS : memory set[Clear button]C : clearAC : all clear (clear result and memory)[Scientific Calculator]