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5,351.2151040 square meters is about one-seven-thousand-five-hundredth as big as Rock Island.
In other words, it's 0.00013643 times the size of Rock Island, and the size of Rock Island is 7,329.80 times that amount.
(a.k.a. Arsenal Island, a.k.a. Rock Island Arsenal) (Illinois, on the Iowa border) (land area only)
Rock Island measures 39,220,000 square meters in total area. It is known as the largest government-owned weapons manufacturing arsenal in the United States and the US Army's only active foundry, as well as a former Union prison camp during the American Civil War.
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