Formula for the circumference of a circle is C = 2πr = πd (r = radius, d = diameter).
Formula for the area of a circle is A = πr2.
To solve this problem, you need to find r, then use the area formula to find A.
Find r: C = 282.54282 m. C = 2πr, so r = C/(2π) = 282.54282/(2·3.14) = 44.96808644 m. (A calculator was used.)
Find A: A = π(44.96808644)2 = (3.14)(44.96808644)2 = 6352.705 m2.
The measurements you gave have too much accuracy, so I am not sure how you want the answer rounded.