Correction for the size of Grand Canyon National Park
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How big is 51 squares?
It's about 0.00000010 times as big as Grand Canyon National Park
The size of Grand Canyon National Park is about 530,724,385 squares.
(Coconino County and Mohave Counties, Arizona, near Fredonia and Grand Canyon, Arizona)
Containing the 446 km (277 mi) Grand Canyon gorge, Grand Canyon National Park covers 530,724,291 squares.