This is why I'm skeptical of "AI-powered everything" approaches. Sometimes the simplest solution is the right one. Microsoft has infinite resources and somehow made a calculator unreliable. Meanwhile, the built-in calculator on every OS just works. There's a lesson here about complexity for complexity's sake. Not everything needs machine learning. Sometimes you just need basic math to work correctly 100% of the time.
Using an over-glorified text autocomplete to invent formulas on Excel - what could go wrong?