Is 710,000,000,000 square centimeters as big as Lake Ontario?
It's about one-two-hundred-fiftieth as big as Lake Ontario

The size of Lake Ontario is about 189,600,000,000,000.0000000000000000000 square centimeters.
(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 189,600,000,000,000.0000000000000000000 square centimeters. It borders the cities of Toronto, Ontario, Canada and Rochester, New York.
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