Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Rd. | Race Title | Circuit | City / State | Date | Winner | Team | Report |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Clipsal 500 | Adelaide Street Circuit | Adelaide , South Australia | 21–24 February | Jamie Whincup | Triple Eight Race Engineering | report |
| 2.0 | Eastern Creek | Eastern Creek Raceway | Sydney , New South Wales | 7–9 March | Will Davison | Dick Johnson Racing | report |
| 3.0 | Hamilton 400 | Hamilton Street Circuit | Hamilton , New Zealand | 18–20 April | Garth Tander | Holden Racing Team | report |
| 4.0 | BigPond 400 | Barbagallo Raceway | Wanneroo , Western Australia | 9–11 May | Mark Winterbottom | Ford Performance Racing | report |
| 5.0 | Midas 400 | Sandown Raceway | Melbourne , Victoria | 7–9 June | Jamie Whincup | Triple Eight Race Engineering | report |
| 6.0 | Skycity Triple Crown | Hidden Valley Raceway | Darwin , Northern Territory | 4–6 July | Steven Richards | Ford Performance Racing | report |
| 7.0 | City of Ipswich 400 | Queensland Raceway | Ipswich , Queensland | 18–20 July | Mark Winterbottom | Ford Performance Racing | report |
| 8.0 | Winton | Winton Motor Raceway | Benalla , Victoria | 1–3 August | Garth Tander | Holden Racing Team | report |
| 9.0 | L&H 500 | Phillip Island Grand Prix Circuit | Phillip Island , Victoria | 12–14 September | Garth Tander Mark Skaife | Holden Racing Team | report |
| 10.0 | Supercheap Auto Bathurst 1000 | Mount Panorama Circuit | Bathurst , New South Wales | 9–12 October | Craig Lowndes Jamie Whincup | Triple Eight Race Engineering | report |
| 11.0 | The Coffee Club V8 Supercar Challenge | Surfers Paradise Street Circuit | Surfers Paradise , Queensland | 23–26 October | Jamie Whincup | Triple Eight Race Engineering | report |
| 12.0 | Gulf Air Desert 400 | Bahrain International Circuit | Manama , Bahrain | 6–8 November | Jamie Whincup | Triple Eight Race Engineering | report |
| 13.0 | Falken Tasmania Challenge | Symmons Plains Raceway | Launceston , Tasmania | 21–23 November | Jamie Whincup | Triple Eight Race Engineering | report |
Question:
What was the number of rounds on the Hidden Valley Raceway?
Answer:
1.0