I see what you're getting at but the issue isn't really the assumed multiplication symbol and it's priority. It's the fact that when there is implicit multiplication present in an algebraic expression, and really best practice for any math above algebra, you should never use the '÷' symbol. You need to represent the division as a numerator and denominator which gets rid of any ambiguity since the problem will explicitly show whether (2+2) is modifying the numerator or denominator. Honestly after 7th grade I can't say I ever saw a '÷' being used and I guess this is why.

That said, I'll die on a hill that this is 16.

A matter of convention: true

Unless you specify you aren't using pemdas, that's generally the assumed order of ops.

This is not one of the ambiguous ones, but it's certainly written to be. Multiplication does indeed have priority under pemdas.

both you and people arguing that it’s 1 would be wrong

No, they're correct Order of operations thread index

This problem is stated ambiguously and implied multiplication

It's not ambiguous, there's no such thing as implicit multiplication

This is all matter of

...following the rules of Maths.