Extrapolating from the NYC Comptrollers Office report that the volume of Madison Square Garden is 400,000 cubic yards.
the arena is 20976 feet or 1949 meters squared.
a circle
the room and the house
402 feet
60 feet
16 square feet
Then each side of the garden is 5 feet in length.
It is 12 square feet
12 feet square equals 124 square feet garden 11ftx11ft equals 121 square ft garden
If the area of the garden is 81 square feet and the perimeter is 36 feet, the solution is that the garden is a square 9 feet x 9 feet, where 4 x (side) =36.
9
5
A square garden shape of 25 square feet could be 5 feet long by 5 feet width. There are other possibilities.
It will be the square root of 225 which is 15 feet