HELP PLEASE the area of a circle is (pi)r2

first let me find what is the radius

4.5 2 = 2.25

2.25 - 1.5 = 0.75

2.25 times 2.25 times (pi) which is (3.14) = 15.896

0.75 times 0.75 times (pi) which is (3.14) = 1.76625

and subtract

15.896 - 1.76625 = 14.12975cm^2