Partial spoiler but this inspired me to (have AI) make a general tool which I’m calling Sheeq, for “spreadsheet-style UI from an equation”.
You type in any equation at the top and it makes a calculator for you, to compute any of the variables based on the others. So here it is solving this math puzzle (well, numerically solving it):
Or here’s a Pounds ↔ Kilograms Calculator 
Maybe I should’ve called it a calculator calculator.
I’ll plan to give the actual math answer to the puzzle next week if no one beats me to it.