A few times lately I've noticed questions like this one coming up om Mathematics SE: https://math.stackexchange.com/questions/3086468/result-of-multiplication-having-zeroes-after-the-decimal
Despite the mathematical title, this really seems to be a question about what to teach primary school children about multiplying decimals and about significant figures and rounding. As such, I'd expect the best answers to be given by teachers who are aware of what children that age are likely to understand, what misconceptions they could accidentally learn and how to avoid them, and so on.
Occasionally I leave a comment like "You could try asking about this on Mathematics Educators SE", but I've not seen anyone take it up.
I'm not sure how to boil this down to a specific question. I suppose I'm asking whether to keep on trying to direct askers of questions with a strong education element here, and asking what else might be done to make it more likely that someone whose question could be well-answered here actually comes here to ask.