Answer
$324\ ft^2$
Work Step by Step
Convert the dimensions of the second garden to feet.
$4\ yd=4\ yd\times\frac{3\ ft}{1\ yd}=12\ ft$
$9\ yd=9\ yd\times\frac{3\ ft}{1\ yd}=27\ ft$
The second garden has longer dimensions, so is the larger garden.
Use the formula for the area of a rectangle.
$A=bh=(12)(27)=324$