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180,533,300 dunams is about nine-and-a-half times as big as Lake Ontario.
In other words, it's 9.5220 times the size of Lake Ontario, and the size of Lake Ontario is 0.1050 times that amount.
(a.k.a. Lac Ontario) (surface area)
The smallest of North America's Great Lakes (by surface area), Lake Ontario has a total area of 18,960,000 dunams. It borders the cities of Toronto, Ontario, Canada and Rochester, New York.
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