Correction for the size of Sydney
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How big is 3,056,130 acres?
It's about as big as Sydney

The size of Sydney is about 3,056,130 acres.
(a.k.a. Cadi) (Greater Sydney region) (Australia)
The region of Greater Sydney, the largest city of Oceania, measures 3,056,130 acres. The Royal National Park, in Sutherland Shire, located in the southern part of the city, is the second oldest national park in the world and covers 32,617.90 acres.