Question: The suburb east of Christie Downs has what land area?

Context paragraphs:
Morphett Vale, South Australia: Morphett Vale is a southern suburb of Adelaide, South Australia in the City of Onkaparinga.  It is the largest suburb in the state, with a population of more than 23,000 and an area of 12.76 km², followed by Paralowie with nearly 10,000 fewer residents.  There are approximately 1,000 businesses in Morphett Vale.

Southern Districts Baseball Club: Southern Districts is a South Australian baseball club playing in the South Australian Baseball League.  Known as the Hawks, their home ground is Peregrine Park in the Southern Adelaide suburb of Christie Downs.

1973–74 Capital Bullets season: The 1973–74 Capital Bullets season was the team's first in Washington, D.C. area, southeast from nearby Baltimore.  Prior to the 1973–74 season, the Baltimore Bullets relocated to Landover, Maryland, a suburb east of Washington, and became the Capital Bullets.

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.

Paynesville, Liberia: Paynesville (sometimes Paynesward) is a suburb east of Monrovia, Liberia.  It is geographically larger than the city of Monrovia and is expanding eastward along the Robertsfield Highway and northeastward beyond Red Light Market, one of the largest market areas in Liberia.  Paynesville is often considered a part of the Greater Monrovia area.  It was the location of the Paynesville Omega Transmitter, the highest structure of Africa, until the tower's demolition in 2011.  The Liberia Broadcasting System is also located in Paynesville.

Christie Downs, South Australia: Christie Downs is a suburb in southern Metropolitan Adelaide within the City of Onkaparinga, South Australia.  It has a unique postcode of 5164, and is adjacent to the suburbs of Christies Beach to the west, Noarlunga Centre to the south, Morphett Vale to the east and Lonsdale to the north.

Epsom Downs: Epsom Downs is an area of chalk upland near Epsom, Surrey; in the North Downs.  Part of the area is taken up by the racecourse, the gallops are part of the land purchased by Stanly Wootton in 1925 in order that racehorses can be trained without interference.  It is open to users such as ramblers, model aircraft flyers, golfers and cyclists.  But all users are subject to the controls laid down by the purchase order; see 'The Wootton Family - Australia to Epsom' by Bill Eacott page 66/67.  Since January 2006 model aircraft flyers on the Downs have been required to be members of the Epsom Downs Model Aircraft Club.  There are over 20 km of routeways for hack riders.  There are bylaws for the use of the Downs.  There are panoramic views of London to the north from the Downs.  The area is served by Epsom Downs and Tattenham Corner railway stations.

Sahalee Country Club: The Sahalee Country Club is a private golf course and country club in the northwest United States, located in Sammamish, Washington, a suburb east of Seattle.  In the Chinookan language, Sahalee means "high heavenly ground."  The 27-hole course is located on a heavily forested plateau immediately east of Lake Sammamish.

Christie Downs railway station: Christie Downs railway station is located on the Seaford line.  Situated in the southern Adelaide suburb of Christie Downs, it is 28.9 kilometres from Adelaide station.

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.

Supporting paragraphs: Christie Downs, South Australia Morphett Vale, South Australia
Answer: 12.76 km²