We will need to find the area of the circle. We will use this formula:
A =

* radius^2
The question says we will use 3.14 for

.
And we know radius is equal to 22.
A = 3.14 * 22^2
A = 3.14 * 484
A = 1519.76
Round to the nearest tenth.
A = 1519.8
So, the maximum area the sprinkler can water is
1519.8 ft squared.
EDIT:
I found a mistake in my answer.