Correction for the size of The Pentagon
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How big is 57,000,000,000 nanoacres?
It's about one-and-two-thirds times as big as The Pentagon
![Flag of The US Flag of The US](/images/flags/USA.png)
The size of The Pentagon is about 34,100,000,000 nanoacres.
(a.k.a. United States Department of Defense Headquarters) (Washington, D.C.) (total floor area)
The Pentagon, the world's largest office building, contains a total floor area of 34,100,000,000 nanoacres. Built during World War II, the designers compensated for the steel rations then in effect by using 310,000 cu. m of concrete in the construction efforts.