Question: How many square miles is the continent of Henkes Islands?

full_context: Document 1: Hansen Rocks: The Hansen Rocks are a group of five small islands lying just north of Holme Bay and the coast of Mac. Robertson Land, Antarctica, about northeast of the Sawert Rocks and Nella Rock, and about northwest of the Canopus Rocks. They were plotted from Australian National Antarctic Research Expeditions (ANARE) air photographs, and were named by the Antarctic Names Committee of Australia for Captain B.T. Hansen, master of the "Nella Dan" for ANARE relief voyages in 1968, 1969, 1970 and 1972.
Document 2: Antarctica: Antarctica is colder than the Arctic for three reasons. First, much of the continent is more than 3,000 m (9,800 ft) above sea level, and temperature decreases with elevation in the troposphere. Second, the Arctic Ocean covers the north polar zone: the ocean's relative warmth is transferred through the icepack and prevents temperatures in the Arctic regions from reaching the extremes typical of the land surface of Antarctica. Third, the Earth is at aphelion in July (i.e., the Earth is farthest from the Sun in the Antarctic winter), and the Earth is at perihelion in January (i.e., the Earth is closest to the Sun in the Antarctic summer). The orbital distance contributes to a colder Antarctic winter (and a warmer Antarctic summer) but the first two effects have more impact.
Document 3: Wilkes Land: Wilkes Land is a large district of land in eastern Antarctica, formally claimed by Australia as part of the Australian Antarctic Territory, though the validity of this claim has been placed for the period of the operation of the Antarctic Treaty, to which Australia is a signatory. It fronts on the southern Indian Ocean between Queen Mary Coast and Adelie Land, extending from Cape Hordern in 100°31' E to Pourquoi Pas Point, in 136°11' E. The region extends as a sector about 2600 km towards the South Pole, with an estimated land area of 2,600,000 km², mostly glaciated. It is further subdivided in the following coastal areas which can also be thought of as sectors extending to the South Pole:
Document 4: Limpet Island: Limpet Island is the southernmost of the Léonie Islands, Antarctica, lying in the entrance to Ryder Bay, close off the southeast coast of Adelaide Island. The Léonie Islands were discovered and first roughly surveyed in 1909 by the Fourth French Antarctic Expedition under Jean-Baptiste Charcot. Limpet Island was surveyed in 1948 by the Falkland Islands Dependencies Survey and so named by them because of the large number of limpet shells found there.
Document 5: Antarctica: Due to its location at the South Pole, Antarctica receives relatively little solar radiation. This means that it is a very cold continent where water is mostly in the form of ice. Precipitation is low (most of Antarctica is a desert) and almost always in the form of snow, which accumulates and forms a giant ice sheet which covers the land. Parts of this ice sheet form moving glaciers known as ice streams, which flow towards the edges of the continent. Next to the continental shore are many ice shelves. These are floating extensions of outflowing glaciers from the continental ice mass. Offshore, temperatures are also low enough that ice is formed from seawater through most of the year. It is important to understand the various types of Antarctic ice to understand possible effects on sea levels and the implications of global cooling.
Document 6: Antarctica: Antarctica (US English i/æntˈɑːrktɪkə/, UK English /ænˈtɑːktɪkə/ or /ænˈtɑːtɪkə/ or /ænˈɑːtɪkə/)[Note 1] is Earth's southernmost continent, containing the geographic South Pole. It is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean. At 14,000,000 square kilometres (5,400,000 square miles), it is the fifth-largest continent in area after Asia, Africa, North America, and South America. For comparison, Antarctica is nearly twice the size of Australia. About 98% of Antarctica is covered by ice that averages 1.9 km (1.2 mi; 6,200 ft) in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula.
Document 7: Saint Helena: There are several rocks and islets off the coast, including: Castle Rock, Speery Island, the Needle, Lower Black Rock, Upper Black Rock (South), Bird Island (Southwest), Black Rock, Thompson's Valley Island, Peaked Island, Egg Island, Lady's Chair, Lighter Rock (West), Long Ledge (Northwest), Shore Island, George Island, Rough Rock Island, Flat Rock (East), the Buoys, Sandy Bay Island, the Chimney, White Bird Island and Frightus Rock (Southeast), all of which are within one kilometre (0.62 miles) of the shore.
Document 8: Duroch Islands: The Duroch Islands are a group of islands and rocks which extend over an area of about , centred about off Cape Legoupil on the north coast of Trinity Peninsula, Antarctica. They were discovered by a French expedition under Captain Jules Dumont d'Urville, 1837–40, who gave the name "Rocher Duroch" to one of the larger islands in the group after Ensign Joseph Duroch of d'Urville's expedition ship, the "Astrolabe". The Falkland Islands Dependencies Survey, which charted the islands in 1946, recommended that the name Duroch be extended to include the entire group of islands. The islands are close to Chile's Bernardo O'Higgins Station at Cape Legoupil.
Document 9: Berthelot Islands: The Berthelot Islands are a group of rocky islands, the largest long, lying south-west of Deliverance Point, off the west coast of Graham Land, Antarctica. They were discovered by the French Antarctic Expedition, 1903–05, under Jean-Baptiste Charcot, and named by him for Marcellin Berthelot, a prominent French chemist. One of the group, Green Island, is protected as Antarctic Specially Protected Area (ASPA) No.108 because of its relatively luxuriant vegetation and large Antarctic shag colony.
Document 10: Henkes Islands: The Henkes Islands are a group of small islands and rocks in extent, lying southwest of Avian Island, close off the southern extremity of Adelaide Island, Antarctica. The islands were discovered by the French Antarctic Expedition, 1908–10, under Jean-Baptiste Charcot, and named by him for one of the Dutch directors of the Magellan Whaling Company at Punta Arenas. Charcot applied the name to the scattered rocks and islands between Cape Adriasola and Cape Alexandra, and the name was restricted to the group described by the UK Antarctic Place-Names Committee (UKAPC) following definitive mapping by the British Antarctic Survey (BAS) in 1961 and the British Royal Navy Hydrographic Survey (BRNHS) in 1963. All of the islands in the group were named by UKAPC.
Document 11: Rosenthal Islands: The Rosenthal Islands are a group of islands fringing the west coast of Anvers Island, north of Cape Monaco, in the Palmer Archipelago of Antarctica. The largest of them is Gerlache Island. Discovered by the German expedition 1873-74, under Dallmann, and named by him for Albert Rosenthal, Director of the Society for Polar Navigation who, with the society, sponsored the expedition.
Document 12: Antarctica: Positioned asymmetrically around the South Pole and largely south of the Antarctic Circle, Antarctica is the southernmost continent and is surrounded by the Southern Ocean; alternatively, it may be considered to be surrounded by the southern Pacific, Atlantic, and Indian Oceans, or by the southern waters of the World Ocean. It covers more than 14,000,000 km2 (5,400,000 sq mi), making it the fifth-largest continent, about 1.3 times as large as Europe. The coastline measures 17,968 km (11,165 mi) and is mostly characterized by ice formations, as the following table shows:
Document 13: Antarctic Plate: The Antarctic Plate is a tectonic plate containing the continent of Antarctica, the Kerguelen Plateau and extending outward under the surrounding oceans. After breakup from Gondwana (the southern part of the supercontinent Pangea), the Antarctic plate began moving the continent of Antarctica south to its present isolated location causing the continent to develop a much colder climate. The Antarctic Plate is bounded almost entirely by extensional mid-ocean ridge systems. The adjoining plates are the Nazca Plate, the South American Plate, the African Plate, the Somali Plate, the Indo-Australian Plate, the Pacific Plate, and, across a transform boundary, the Scotia Plate.
Document 14: Henfield Rock: Henfield Rock is an offshore rock lying northwest of Robert Island in the South Shetland Islands, Antarctica. It was known to the early 19th century sealers operating from nearby Clothier Harbour, and sometimes included under the name 'Powels Islands' or 'Heywood Islands'.
Document 15: Wilkes Land: Wilkes Land is a large district of land in eastern Antarctica, formally claimed by Australia as part of the Australian Antarctic Territory, though the validity of this claim has been placed for the period of the operation of the Antarctic Treaty, to which Australia is a signatory. It fronts on the southern Indian Ocean between Queen Mary Coast and Adelie Land, extending from Cape Hordern in 100°31' E to Pourquoi Pas Point, in 136°11' E. The region extends as a sector about 2600 km towards the South Pole, with an estimated land area of 2,600,000 km², mostly glaciated. It is further subdivided in the following coastal areas which can also be thought of as sectors extending to the South Pole:
ground_truth: 5,400,000
sub_queries: What is the continent of Henkes Islands? Answer: Antarctica
What is the size of Antarctica in square miles? Answer: 5,400,000