How many football fields is 1 acre?

Could you please elaborate on the comparison being made in the statement "How many football fields is 1 acre?"? I'm curious to understand the context behind this question, as it seems to be comparing two vastly different units of measurement. Specifically, I'm wondering if you're asking about the size of a standard football field, as it can vary depending on the level of play, and how that compares to the size of an acre, which is a unit of land measurement. Additionally, I'm also interested in knowing if there's a particular reason behind this comparison, such as a real estate or land use scenario where knowing the answer might be useful.