What calculator should i make next?

Question

I've built a binary notation calculator (up to 50 binary digits, to the value of 2**51-1) and it's here below, almost definitely an easier way of doing it, feel free to adapt it, but send me your adaptation of my program.
so I ask you all... What do I do next?????
https://code.sololearn.com/cgWJAMAebvAU/?ref=app

Answer 1

Build a Standard Scientific Calculator.....This time add graphics to it...