That's not possible to tell without more information. Everyone works at different speeds; we have to have at least some information in order to tell.
46 bricks; add a few more for waste and cutting
There are 2025 rectangles in a 9x9 grid.
Assuming 9x9 is also in feet, then answer is 81 square feet.
9x9=81
6,670,903,752,021,072,936,960
81
9x9 = 81.
90
8100
11x8 - 9x9 = 7
9x9 27x3 81x1
I