How many city blocks are in 909000 acres?

Question:please hurry i reALLY NEED THIS ANSWER

Answers:
An acre is 4,840 square yards or 43,560 sq. feet. A city block can be different sizes, in Manhattan a city block is 264 by 900 feet or 237, 600 sq. feet ( a little more than 5 acres). In some US cities a block can be 10 acres or more. So I don't think there is a definitive answer.