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:
| Club | Played | Drawn | Lost | Points for | Points against | Tries for | Tries against | Try bonus | Losing bonus | Points |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Club | Played | Drawn | Lost | Points for | Points against | Tries for | Tries against | Try bonus | Losing bonus | Points |
| Bro Ffestiniog RFC | 18 | 0 | 1 | 793 | 176 | 124 | 21 | 16 | 0 | 84 |
| Bethesda RFC | 18 | 0 | 2 | 734 | 168 | 109 | 19 | 14 | 1 | 79 |
| Caereinion OBRA | 18 | 0 | 4 | 520 | 181 | 79 | 21 | 8 | 1 | 65 |
| Rhyl and District RFC | 18 | 0 | 8 | 371 | 405 | 55 | 58 | 7 | 2 | 49 |
| Newtown RFC | 18 | 0 | 8 | 307 | 394 | 39 | 57 | 4 | 2 | 42 |
| Machynlleth RFC | 18 | 0 | 10 | 565 | 430 | 83 | 65 | 9 | 5 | 42 |
| Wrexham RFC | 18 | 0 | 10 | 306 | 435 | 47 | 63 | 5 | 2 | 39 |
| Welshpool RFC | 18 | 0 | 14 | 313 | 478 | 44 | 75 | 3 | 5 | 24 |
| Rhosllanerchrugog RFC | 18 | 0 | 15 | 205 | 578 | 34 | 90 | 4 | 2 | 14 |
| Bangor RFC | 18 | 0 | 18 | 125 | 994 | 18 | 163 | 0 | 0 | 0 |
| Correct as of 21 July 2009 | Correct as of 21 July 2009 | Correct as of 21 July 2009 | Correct as of 21 July 2009 | Correct as of 21 July 2009 | Correct as of 21 July 2009 | Correct as of 21 July 2009 | Correct as of 21 July 2009 | Correct as of 21 July 2009 | Correct as of 21 July 2009 | Correct as of 21 July 2009 |
Question:
What is Drawn, when Played is "18", and when Points Against is "478"?
Answer:
0.0