tom wants a patio to cover 1/4 of the yard.the area is 1/4s^2.what is the area of the patio if the yard is 12 feet on each side of the square patio

The expresion for the area of the patio is:
[tex]\frac{1}{4}s^2[/tex]Where s = side lenght of the yards in feets
Then we replace s = 12ft:
[tex]\frac{1}{4}(12ft)^2=\frac{1}{4}144ft^2=36ft^2[/tex]Then the area of the patio is 36ft²