Farmer has a field 1 square mile wide and 1 square mile wide. He divides it into fields 1/3 mile wide and 1/3 mile long how many fields will he have

Answer 1

"1 square mile wide and 1 square mile wide"
makes no sense, there are no such units

Does he have a field 1 mile by 1 mile ?

make a sketch of a square 1 by 1
Divide the sides into 3 equal length and draw the dividing lines.
You should have an X and O like game grid
How many squares can you count ?