If you're taking math or science courses, you'll most likely only be allowed to use a handheld calculator on exams.When you're on your own, you're better off using something like Python. Python's ...

Using NumPy for array and matrix math in Python Many mathematical operations, especially in machine learning or data science , involve working with matrixes , or lists of numbers.

If you use Python though, you have access to sympy, the symbolic math library. ... So, using Python data types, you get: 6.2 -> 6.2000000000000002 Whereas the sympy data types give: S(6.2) -> ...