You will be given a definition of a task first, then some input of the task.
You are given a passage. You need to construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is the whole paragraph. Avoid creating questions that can be answered correctly without actually understanding the paragraph.

A feet is a measure of lenght while an acre measures a surface. You could say, as "Dr. Math" suggests here that there are 43560 SQUARED feet in an acre:
http://mathforum.org/library/drmath/view/59068.html
When in doubt about Math, always Ask Dr. Math! ;-)
Output:
How many feet are in an acre?