Need with finding approximate area of the rectangle

Let's start with the scale.
1/2 inch in the drawing represents a real 4 ft.
The drawing is in inches. The real measurement is in ft.
4 divided by 1/2 is 8.
If you multiply the drawing measurements by 8, you get the real measurements in feet.

I assume your drawing measurements are correct.

What is the real measure of the length?
2 1/4 = 2.25
Multiply by 8 to get real feet.
2.25 * 8 = 18
The real length is 18 ft.

What is the real measure of the width?
1 5/8 = 1.625
Multiply by 8 to get real feet.
1.625 * 8 = 13
The real width is 13 ft.

area = length * width = 18 ft * 13 ft = 234 square feet

D 234 square feet