There are no values from the spreadsheet in this case.
What hill are you trying to die on here? In the picture, the numbers input are clearly 1,2 and 3.
They could of course require that optional cell or cell range parameter after the prompt,
No. It is trivial to identify if the input is text or value. You don't need an LMM to do that.
Excel famously thinks everything is a date
That's only interpreting data entry. Date values are stored in cells as doubles.
Not to mention there are other things to do with numbers which don't require arithmetic.
Yes these are the use cases where an LLM would add some (questionable) value.