Question: What is the area of the island where Hawaii Route 93 is located ?
Context: Discovery Harbour is an unincorporated community and census-designated place on the island of Hawaii in Hawaii County, Hawaii, United States.  Its population was 949 as of the 2010 census.  The community is located near the island's southern tip, south of Hawaii Route 11. Hawaii Route 31, also known as the Pi'ilani Highway, is a 38-mile road on the island of Maui in the U.S. state of Hawaii.  The state road begins in at an intersection with Hawaii Routes 310 and 311 in the West Maui town of Kihei.  The highway formerly ran parallel to the coast all the way to the southern terminus of the Hana Highway (Route 360), until developments in Wailea and Makena blocked access. .  The Kihei section of the highway now terminates in Wailea, and the much longer Kaupo section, which is county-maintained as County Road 31, connects Route 37 near Kula to the Route 360 south of Hana (at the western border of Haleakala National Park). In the U.S. state of Nevada, U.S. Route 93 Alternate (US 93 Alt.  or Alt 93) is an alternate route of U.S. Route 93 located in the northeast part of the state.  It connects Lages Station to Wells via the town of West Wendover. Route 93 is a major east–west highway on the island of Oahu which begins as Interstate H-1 terminates in Kapolei and ends at Kaena Point on the extreme northwest end of Oahu, just past Makaha.  It is part of the Farrington Highway. Route 560 or Kaua'i Belt Road-North Shore section, is a ten-mile (16 km) scenic road on the northern shore of the island of Kauaʻ i in Hawaii.  The entire belt road is signed as the Kuhio Highway and Hawaii Route 56 was once signed on this route before it was downgraded to become Hawaii Route 560 in the late 1960s.  The Kuhio Highway is named after Jonah Kūhiō Kalaniana'ole, the second non-voting Congressional Delegate from territorial Hawaii. Hawaii Route 240 is a State Route in the U.S. State of Hawaii.  The highway is located on the island of Hawaii, and travels from southeast of the city of Honokaa northwest to Waimanu Natural Estuarine Research Reserve, on the coast of the island.  The highway connects the settlement located by the Reserve to the main highway, Hawaii Route 19. Oahu (] ) or O'ahu , known as "The Gathering Place", is the third largest of the Hawaiian Islands.  It is home to about two-thirds of the population of the U.S. state of Hawaii.  The state capital, Honolulu, is on Oahu's southeast coast.  Including small associated islands such as Ford Island and the islands in Kāneohe Bay and off the eastern (windward) coast, its area is 596.7 sqmi , making it the 20th largest island in the United States.  including the rest of the Hawaiian Islands. Route 64 is a three-mile (5 km) road that stretches from Nimitz Highway (Hawaii Route 92) to the entrance of Sand Island State Recreation Area just west of downtown Honolulu.  The route also goes by the street name as Sand Island Parkway.  The route gives access to Sand Island State Recreation Area and the U.S. Coast Guard Honolulu Branch by crossing the Kapalama Channel. Interstate H-1 (abbreviated H-1) is the busiest Interstate Highway in the US state of Hawaii.  The highway is located on the island of O‘ahu.  Despite the number, this is an east–west highway—the 'H'-series (for Hawaii) numbering reflects the order in which routes were funded and built.  H-1 goes from Route 93 (Farrington Highway) in Kapolei to Route 72 (Kalanianaole Highway) in Kāhala.  East of Middle Street in Honolulu (exit 19A), H-1 is also known as the "Lunalilo Freeway" and is sometimes signed as such at older signs in central Honolulu.  West of Middle Street, H-1 is also known as the "Queen Liliʻ uokalani Freeway"; this name is shown on some roadmaps.  It is both the southernmost and westernmost signed Interstate Highway in the United States. Wikieup is a small unincorporated community located on U.S. Route 93 in Mohave County, Arizona.  It is located approximately 32 mi south of Interstate 40 using U.S. Route 93 and approximately 124 mi northwest of Phoenix, Arizona.  In 2000, the population of Wikieup's ZCTA was 305.
Answer: 596.7 sqmi