Question: Which highway is 840 km in length where the town Wandong can be found?
Context: The Kinchega National Park is a protected national park that is located in the Far West region of New South Wales, in eastern Australia.  The 44259 ha national park is located approximately 840 km west of Sydney and 111 km south-east of Broken Hill .  The park adjoins the town of Menindee .  The eastern edge of the Kinchega National Park is formed by the Darling River. The Khilok River (Russian: река Хилок ; Mongolian: Хилго/Khilgo , Buryat: Хёлго/Hyolgo ) is a river in Eastern Siberia and part of the Selenge River.  The length of the river is 840 km and its watershed is 38500 km2 .  There are a few settlements on its banks: Khilok, Bada etc. Shiwu Passenger Railway () is an 840 km high-speed rail line between Shijiazhuang and Wuhan in China.  It has been under construction since October 2008.  The total investment is 116.76 billion yuan.  The design speed is 350 km/h (220 mph).  It is part of the Jingguang Passenger Dedicated Line, a high-speed railway connecting Beijing and Guangzhou, which runs parallel to the older conventional Jingguang Railway. Lensk (Russian: Ленск ; ] ; Yakut: Лиэнскэй , "Lienskey") is a town and the administrative center of Lensky District of the Sakha Republic, Russia, located on the left bank of the Lena River, approximately 840 km west of Yakutsk, the capital of the republic.  As of the 2010 Census, its population was 24,966. The Hume Highway, inclusive of the sections now known as the Hume Freeway and Hume Motorway, is one of Australia's major inter-city national highways, running for 840 km between Melbourne in the southwest and Sydney in the northeast.  Upgrading of the route from Sydney's outskirts to Melbourne's outskirts to dual carriageway was completed on 7 August 2013. The Franpipe is a 840 km long natural gas pipeline from the Draupner E riser in the North Sea to the receiving terminal at Port Ouest in Dunkirk, France.  The gas transported to France originates mainly from Sleipner East and Troll Vest gas fields.  The pipeline was officially inaugurated on 9 October 1998. The 1556 Shaanxi earthquake or Huaxian earthquake () or Jiajing earthquake () was a catastrophic earthquake and is also the deadliest earthquake on record, killing approximately 830,000 people.  It occurred on the morning of 23 January 1556 in Shaanxi, during the Ming Dynasty.  More than 97 counties in the provinces of Shaanxi, Shanxi, Henan, Gansu, Hebei, Shandong, Hubei, Hunan, Jiangsu and Anhui were affected.  Buildings were damaged slightly in the cities of Beijing, Chengdu and Shanghai.  An 840 km area was destroyed, and in some counties as much as 60% of the population was killed.  Most of the population in the area at the time lived in yaodongs, artificial caves in loess cliffs, many of which collapsed with catastrophic loss of life. Cape Sheridan is on the northeastern coast of Ellesmere Island, Canada situated on the Lincoln Sea in the Arctic Ocean, on the mouth of Sheridan River, west bank.  It is one of the closest points of land to the geographic North Pole, approx 840 km to the north, Cape Columbia is however some 75 km closer to the Pole. Biombo is a region in western Guinea-Bissau, with an area of 840 km and its capital is Quinhámel.  There has not been any local administration since the civil war of 1998-99 and all the social services are done by organs of civil society and other government agencies.  It is a coastal region covered with Mangrove swamps, rain forest and tangled forest and receives an annual rainfall of more than 1000 mm . Wandong is a town in Victoria, Australia.  The town is about 50 km north of the state capital, Melbourne, on the Hume Highway.  It adjoins the town of Heathcote Junction, and at the 2011 census , the two towns had a population of 1,294.  The main centre nearest Wandong is Kilmore.
Answer: Hume Highway