There are 2025 rectangles in a 9x9 grid.
Assuming 9x9 is also in feet, then answer is 81 square feet.
9x9=81
81
9x9 = 81.
6,670,903,752,021,072,936,960 , or 6.67*10^21.
No, anyone can make sudokus.
90
8100
11x8 - 9x9 = 7
You can get a few friends over and cut out a lot of sudokus out, see who can do them first.
9x9 27x3 81x1