Question: Kaurna is an electoral district of the House of Assembly in the Australian state of South Australia, it is how many km², a semi-urban electorate on Adelaide's far-southern beaches, taking in the suburbs of Aldinga Beach, an outer southern suburb of Adelaide?

Context paragraphs:
Electoral district of Taylor: Taylor is an electoral district of the House of Assembly in the Australian state of South Australia.  This district is named after Doris Irene Taylor MBE, a leading force in the founding of Meals on Wheels, and Labor activist.  Taylor is a 249.8 km² semi-urban electorate in Adelaide's far northern suburbs and fringe farmland.  A large portion of the district lives in its southern edges, corresponding to the northern fringes of Adelaide.  It includes the suburbs of Andrews Farm, Bolivar, Buckland Park, Burton, Direk, Edinburgh, Edinburgh North, Lewiston, MacDonald Park, Penfield, Penfield Gardens, St Kilda, Virginia, Waterloo Corner, and parts of Paralowie, Port Gawler and Salisbury North.

Aldinga Beach, South Australia: Aldinga Beach is an outer southern suburb of Adelaide, South Australia.  It lies within the City of Onkaparinga and has the postcode 5173.  At the 2011 census , Aldinga Beach had a population of 9,697.

Electoral district of Port Adelaide: Port Adelaide is an electoral district of the House of Assembly in the Australian state of South Australia.  Named after Port Adelaide because of its geographical location, it is a 91.3 km² urban electorate on Adelaide's Lefevre Peninsula and stretches east toward Adelaide's northern suburbs.  It contains a mix of seaside residential areas, wasteland and industrial regions.  Besides the bulk of the suburb of Port Adelaide, which is shared with Cheltenham, it includes the suburbs of Cavan, Dry Creek, Gillman, Globe Derby Park, Green Fields, Largs North, Mawson Lakes, North Haven, Osborne, Ottoway, Outer Harbor, Taperoo and Wingfield as well as parts of Gepps Cross, Pooraka and Rosewater.

Division of Kingston: The Division of Kingston is an Australian Electoral Division in South Australia covering the outer southern suburbs of Adelaide.  The 171 km² seat stretches from Hallett Cove and O'Halloran Hill in the north to Sellicks Beach in the south, including the suburbs of Aldinga Beach, Christie Downs, Christies Beach, Hackham, Hallett Cove, Huntfield Heights, Lonsdale, Maslin Beach, Moana, Morphett Vale, Old Noarlunga, Onkaparinga Hills, Port Noarlunga, Reynella, Seaford, Sellicks Beach, Sheidow Park, Port Willunga, Trott Park, Woodcroft, and parts of Happy Valley and McLaren Flat.

Electoral district of Colton: Colton is an electoral district of the House of Assembly in the Australian state of South Australia.  It is a 15.5 km² urban electorate on Adelaide's western beaches, taking in the suburbs of Fulham, Fulham Gardens, Henley Beach, Henley Beach South, Kidman Park as well as parts of Grange, Lockleys and Seaton.

Electoral district of Reynell: Reynell is an electoral district of the House of Assembly in the Australian state of South Australia.  It is named after John Reynell, a leading force in the founding of the Agricultural and Horticultural Society of South Australia and noted 19th-century grape farmer and vineyard owner in the area.  Reynell is a 30 km² urban residential and industrial electorate in Adelaide's far south.  It includes the suburbs of Christie Downs, Lonsdale, Morphett Vale and O'Sullivan Beach, as well as part of Christies Beach.  The suburb of Reynella is currently in the marginal Liberal seat of Mitchell.

Electoral district of Kaurna: Kaurna is an electoral district of the House of Assembly in the Australian state of South Australia.  Named after the Kaurna aboriginal tribe which originally inhabited the Adelaide plains, it is a 52.7 km² semi-urban electorate on Adelaide's far-southern beaches, taking in the suburbs of Aldinga Beach, Maslin Beach, Moana, Port Noarlunga, Port Noarlunga South, Port Willunga, Seaford, Seaford Meadows and Seaford Rise as well as parts of Aldinga and Christies Beach.  It is one of only two state districts named after South Australia's indigenous people (the other being the Electoral district of Narungga).

Electoral district of Heysen: Heysen is an electoral district of the House of Assembly in the Australian state of South Australia.  It is named after Sir Hans Heysen, a prominent South Australian landscape artist.  It is a 1,102 km² electoral district that takes in some of the outer southern suburbs of Adelaide before fanning south-east to include most of the Adelaide Hills, as well as farming areas some distance from the capital.  It includes the areas of Aldgate, Bridgewater, Echunga, Hahndorf, Macclesfield, Meadows, Stirling and Strathalbyn, as well as part of Mount Barker.  Although geographically it is a hybrid urban-rural seat, it is counted as a metropolitan seat.

Electoral district of Bligh: Bligh was an electoral district of the Legislative Assembly in the Australian state of New South Wales.  It was created in 1962, partly replacing Paddington-Waverley and was an urban electorate, covering 13.03 km² and taking in the suburbs of Potts Point, Darling Point, Woolloomooloo, Elizabeth Bay, Rushcutters Bay, Edgecliff, Darlinghurst, Paddington, Surry Hills, Redfern, Darlington and part of Chippendale.  It was a highly diverse electorate, as it contained both some of the wealthiest suburbs of Sydney, along the edge of the harbour, as well as some of the city's most disadvantaged areas, such as those around Redfern.  This had the effect of making Bligh a marginal electorate, although as the wealthier suburbs outnumbered the poorer suburbs, it tended to be Liberal-leaning.  Independent Clover Moore defeated the incumbent Liberal member Michael Yabsley in 1988 (Yabsley subsequently reentered Parliament in the Vaucluse by-election later that year) and held the seat until its abolition in 2007, when it was replaced by the electoral district of Sydney.

Electoral district of Cheltenham: Cheltenham is an electoral district of the House of Assembly in the Australian state of South Australia.  Named after the suburb of the same name, it is an 18.1 km² urban electorate in Adelaide's north-west, taking in the suburbs of Alberton, Albert Park, Athol Park, Cheltenham, Findon, Hendon, Pennington, Queenstown, Royal Park, St Clair, Woodville, Woodville South, Woodville West, and parts of Port Adelaide and Rosewater.  The Cheltenham electorate is inside the federal-level electorate of Port Adelaide.

Supporting paragraphs: Electoral district of Kaurna Aldinga Beach, South Australia
Answer: 52.7