We need to find the area of a rectangle 12 feet by 18 feet.
The area of a rectangle is given by the following formula:
[tex]A=L*W[/tex]Where L is its length and W is its width.
If we replace L=12 ft and W=18 ft, we obtain:
[tex]\begin{gathered} A=12ft*18ft \\ A=216ft^2 \end{gathered}[/tex]The area of the rectangle is 216 square feet.