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:
| Position | Club | Played | Won | Drawn | Lost | Pts For | Pts Agst | B.P. | Points |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Castleford Tigers | 18.0 | 17.0 | 0.0 | 1.0 | 860.0 | 247.0 | 0.0 | 51.0 |
| 2.0 | Widnes Vikings | 18.0 | 16.0 | 0.0 | 2.0 | 740.0 | 220.0 | 2.0 | 50.0 |
| 3.0 | Halifax | 18.0 | 12.0 | 0.0 | 6.0 | 616.0 | 421.0 | 2.0 | 38.0 |
| 4.0 | Whitehaven | 18.0 | 11.0 | 0.0 | 7.0 | 474.0 | 342.0 | 5.0 | 38.0 |
| 5.0 | Leigh Centurions | 18.0 | 9.0 | 0.0 | 9.0 | 454.0 | 474.0 | 4.0 | 31.0 |
| 6.0 | Sheffield Eagles | 18.0 | 6.0 | 1.0 | 11.0 | 414.0 | 527.0 | 4.0 | 24.0 |
| 7.0 | Dewsbury Rams | 18.0 | 5.0 | 0.0 | 13.0 | 346.0 | 572.0 | 6.0 | 19.0 |
| 8.0 | Batley Bulldogs | 18.0 | 5.0 | 1.0 | 12.0 | 372.0 | 645.0 | 2.0 | 19.0 |
| 9.0 | Rochdale Hornets | 18.0 | 3.0 | 0.0 | 15.0 | 302.0 | 700.0 | 1.0 | 10.0 |
Question:
What is the number of played when points against 645?
Answer:
1.0