A (floor area) can be constituted-of-or-filled-with some square meters.
A (land area) can be constituted-of-or-filled-with some square miles.
Some square feet can be constituted-of-or-filled-with office.
A (land area) can be constituted-of-or-filled-with some square kilometres.
Some square feet can be constituted-of-or-filled-with retail.