Because

when learning about JavaScript operators, we are introduced to different operators (here: https://javascript.info/operators). Therefore, the solution (to get the power) for the calculator exercise should just stick to using the exponentiation operator (**) instead of a method that seems to come out of nowhere.

This PR

• Replaces the solution for 12_calculator (where you get the power) with a**b (instead of Math.pow(a, b))

Pull Request Requirements

• I have thoroughly read and understand The Odin Project Contributing Guide
• The title of this PR follows the location of change: brief description of change format, e.g. 01_helloWorld: Update test cases
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• If this PR addresses an open issue, it is linked in the Issue section
• If this PR includes any changes that affect the solution of an exercise, I've also updated the solution in the /solutions folder