I don't see any need for state management in these requirements. You have form that performs a calculation and prints out an html table in the results or a sing

I don't see any need for state management in these requirements. You have form that performs a calculation and prints out an html table in the results or a single value. All of this can be done with dead simple html and js, and it would probably be 10000x faster than a react hello world page. I have made little tools like this in pure html and JS before. Its really quite straight forward and using a framework is overkill.