Question: How large is the shipyard where the USS Mahan was built ?

Context paragraphs:
Kattupalli Shipyard: The Kattupalli Shipyard cum Captive Port Complex is a large shipyard project at Kattupalli village near Ennore of Chennai being built by L&T Shipbuilding Ltd.  It is being set up jointly by TIDCO and Larsen & Toubro (L&T) in two phases.L&T shipbuilding kattupalli is having shipyard & a minor port.

USS Pocahontas (1852): The first USS "Pocahontas, a screw steamer built at Medford, Massachusetts in 1852 as "City of Boston", and purchased by the Navy at Boston, Massachusetts on 20 March 1855, was the first United States Navy ship to be named for Pocahontas, the Algonquian wife of Virginia colonist John Rolfe.  She was originally commissioned as USS "Despatch — the second U.S. Navy ship of that name — on 17 January 1856, with Lieutenant T. M. Crossan in command, and was recommissioned and renamed in 1860, seeing action in the American Civil War.  As "Pocahontas", one of her junior officers was Alfred Thayer Mahan, who would later achieve international fame as a military writer and theorist of naval power.

Constanța Shipyard: The Constanţa Shipyard was first mentioned as the "Craft Repair Shop" within the Constanţa Harbour area in 1892 by the Ministry for Public Works.  In July 1905, the shipyard housed the Russian battleship "Potemkin" and refloated her after she was half scuttled by her mutinous crew.  The first ship ever constructed by the shipyard and launched to sea on May 31, 1936 was a 12 m long yacht named "Crai Nou", designed and built by Alexandru Theodoru a student at the Naval School in Constanţa and graduate of the French Naval School.  During World War II, the shipyard provided repair and maintenance to the Italian flotilla of midget submarines operating in the Black Sea.  Together with the Galați shipyard, it also rebuilt, maintained and repaired numerous German R-boats during the War.  1950 the shipyard began to construct ships, pontoons, tugboats and towboats.  In 1975 the shipyard constructed one bulk carrier of  DWT which was the first large ship ever constructed in Romania.

USS Portsmouth (1843): The second USS Portsmouth was a wooden sloop-of-war in the United States Navy in service during the mid-to-late 19th century.  She was designed by Josiah Barker on the lines of a French-built privateer, and built at the Portsmouth Navy Yard, directly across the Piscataqua River from Portsmouth, New Hampshire.  She was described as an improvement over the USS "Saratoga" built in the same shipyard a year earlier.  The "Portsmouth" was launched on 23 October 1843 and commissioned on 10 November 1844, with Commander John Berrien Montgomery in command.

Black Sea Shipyard: The Black Sea Shipyard (Ukrainian: Чорноморський суднобудівний завод ; Russian: Черноморский судостроительный завод ) is located in Mykolaiv, Ukraine.  It was founded in 1895 by Belgian interests and began building warships in 1901.  At the beginning of World War I in 1914, it was one of the largest industrial facilities in the Russian Empire.  The shipyard was moribund until the Soviets began building up the fleet in the 1930s and it began building surface warships as well as submarines.  The yard was badly damaged during World War II and took several years to be rebuilt.  Surface warship construction temporarily ended in the mid-1950s before being revived in the mid-1960s and submarines were last built in the yard in late 1950s.  The Black Sea Shipyard built all of the Soviet Navy's aircraft carrying ships and continues to build large commercial ships.

USS Mahan (DDG-42): USS "Mahan" (DDG-42), was a "Farragut"-class guided missile destroyer in the United States Navy.  She was named for Rear Admiral Alfred Thayer Mahan USN (1840–1914).  The ship was Laid down as DLG-11 by the San Francisco Naval Shipyard on 31 July 1957 and launched on 7 October 1959.  "Mahan" was sponsored by Mrs. H. P. Smith, wife of Vice Adm. Harold Page Smith, and commissioned on 25 December 1960.  "Mahan" was reclassified as a guided missile destroyer on 30 June 1975 and designated DDG-42.  USS "Mahan" was decommissioned on 15 June 1993 and stricken from the Naval Vessel Register on the same day.

SMS Preussen (1873): SMS "Preussen"  was an armored frigate of the German Kaiserliche Marine.  The ship was built by the AG Vulcan shipyard in Stettin in 1871–1876; she was commissioned into the fleet in July 1876.  She was the first large warship of the German navy built by a private shipyard; all previous vessels had been ordered abroad or built by Royal or Imperial dockyards.  Her main battery of four 26 cm guns was mounted in a pair of twin gun turrets amidships.

USS Fanning (DD-385): USS "Fanning" (DD-385) was a "Mahan"-class destroyer, in the United States Navy named for Nathaniel Fanning.  Her first action was during World War II, immediately following the 7 December 1941 attack on Pearl Harbor.  "Fanning" continued to serve in the Pacific Theatre throughout the war, and was decommissioned 14 December 1945.  She was one of the last "Mahan"-class destroyers.  "Fanning" and USS "Dunlap" were built from the same basic "Mahan" design but slightly modified.  Some sources refer to them as the "Dunlap"-class destroyers.

USS Mahan (DDG-72): USS "Mahan" (DDG-72) is an "Arleigh Burke"-class destroyer currently in service with the United States Navy.  She is named for seapower naval theorist Alfred Thayer Mahan being the fourth Navy ship to bear the name.  This ship is the 22nd destroyer of her class.  USS "Mahan" was the 12th ship of this class to be built at Bath Iron Works in Bath, Maine, and construction began on 17 August 1995.  She was launched and christened on 29 June 1996.  On 14 February 1998 she was commissioned in Tampa, Florida.  "Mahan" is homeported in Norfolk, Virginia, and as of 2012 is attached to Destroyer Squadron 2.  By 2016, the ship was part of Destroyer Squadron 22.

San Francisco Naval Shipyard: The San Francisco Naval Shipyard was a United States Navy shipyard in San Francisco, located on 638 acre of waterfront at Hunters Point in the southeast corner of the city.

Supporting paragraphs: USS Mahan (DDG-42) San Francisco Naval Shipyard
Answer: 638 acre