Answer:
area = 2.14 * 3 ** 2
Step-by-step explanation:
No clue what language you use but this should be pretty universal. To find the area of a circle you use pi(r) ^ 2 or pi times radius squared

In python it looks like this:
>>> area = 3.14 * 3 ** 2
>>> print(area)
28.26 <Printed text