If you want to solve for the area of the parallelogram that is simply the base times the height.
The parallelogram is inside a rectangle composed of squares with sides of 9 ft each.
The sides of three squares are vertical (top to bottom) within the parallelogram
There are four horizontal lengths are across the bottom
Keeping in mind that the sides of the squares within the parallelogram are all 9 ft you should be able to count the vertical feet and the horizontal feet you need to determine the height and base for the parallelogram.
Give it a try.