Correction for the size of Grand Central Station
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How big is 27.40 acres?
It's about three-fifths as big as Grand Central Station

The size of Grand Central Station is about 50 acres.
(formally Grand Central Terminal, a.k.a. Grand Central, a.k.a. GCT) (New York City, New York) (total terminal area).
Grand Central station, the largest train station in the world by platform count, measures 50 acres in total area. The large flag which was suspended from the concourse ceiling following the September 11th 2001 terrorist attacks measures about 0.02 acres.