An apple pie with a circumference of 28.26 inches is cut into 6 equal-sized pieces. two pieces of the pie are eaten. what is the area of the pie that is left? select the correct answer. use 3.14 for π.

C = πd
d = C / π
d = 28.26 / 3.14
d = 9 in

but r = d/2 = 9/2 = 4.5 in

A = π r^2
= 3.14 x (4.5^2)
= 3.14 x 20.25
= 63.585

divided into 6 equal
so 63.585 / 6 = 10.5975

but ate 2, so there are 4 pieces left
4 x 10.5975 = 42.39

answer
the area of the pie that is left is 42.36 in^2

What am i doing here. add?