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How big is 27.4320 square meters?

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It's about one-three-thousandth as big as Alcatraz.
In other words, 27.4320 square meters is 0.00031 times the size of Alcatraz, and the size of Alcatraz is 3,200 times that amount.
(a.k.a. The Rock) (California)
Alcatraz Island measures 89,000 square meters. It is known a part of the Golden Gate National Recreation Area, and has historically served as a lighthouse, fort, military prison, and — most famously — a federal prison.
It's about one-four-thousandth as big as Ellis Island.
In other words, 27.4320 square meters is 0.000247 times the size of Ellis Island, and the size of Ellis Island is 4,050 times that amount.
(Jersey City, New Jersey and New York City, New York)(now officially part of the Statue of Liberty National Monument)
Ellis Island, home of the Ellis Island Immigration Station, is 111,000 square meters in total area. Nine-tenths of the island were artificially created after the New York-New Jersey borders had already been defined, leading to a sovereignty dispute which was settled by the US Supreme Court in 1998.
It's about 5,000 times as big as a Playing Card.
In other words, the size of a Playing Card is 0.0002 times 27.4320 square meters.
(ISO 216 B8 size)
A single ISO 216 B8-size playing card measures 0.0056 square meters. Although this size is the most common playing card, many casinos use the smaller "bridge size" card — 0.0026 square meters smaller.
It's about one-five-thousandth as big as The Pentagon.
In other words, 27.4320 square meters is 0.000199 times the size of The Pentagon, and the size of The Pentagon is 5,030 times that amount.
(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 138,000 sq. m. 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.
It's about 5,000 times as big as a Post-it® Note (3M).
In other words, the size of a Post-it® Note (3M) is 0.0002 times 27.4320 square meters.
(3M) (generically sticky notes, a.k.a. repositionable notes, a.k.a. repositional notes)
A Post-it® Note measures 0.0054 square meters in total area. In September, 1989, Hurricane Hugo swept through Charleston, South Carolina with winds up to 230 kph (140 mph), uprooting eight oak trees in Mr. Bruce Brakefield's yard, but leaving in place a Post-it® note attached to his front door.
It's about one-eight-thousand-five-hundredth as big as Washington National Cathedral.
In other words, the size of Washington National Cathedral is 8,300 times 27.4320 square meters.
(a.k.a. Cathedral Church of Saint Peter and Saint Paul) (Washington, DC) (total plot)
Sitting atop the 115 m (377 ft) tall Mount Saint Alban at the corner of Massachusetts and Wisconsin Avenues, Washington National Cathedral sits on a landscaped, 230,000 square meters plot.
It's about one-eight-thousand-five-hundredth as big as The United States Capitol.
In other words, the size of The United States Capitol is 8,300 times 27.4320 square meters.
(Washington, DC) (Immediate grounds size)
The grounds of United States Capitol, at the center of Washington DC's quadrants, consists of about seventeen buildings on a 230,000 square meters plot. While the Capitol Building is the central feature, other buildings include the Supreme Court Buildings and the Library of Congress Buildings, as well as several monuments and sculptures.