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 | Points difference | Bonus Points | Points |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Club | Played | Drawn | Lost | Points for | Points against | Points difference | Bonus Points | Points |
| Penlan RFC | 18 | 0 | 0 | 780 | 165 | +615 | 16 | 88 |
| Penybanc RFC | 18 | 0 | 6 | 379 | 250 | +129 | 9 | 57 |
| Tregaron RFC | 18 | 0 | 7 | 418 | 256 | +162 | 11 | 55 |
| Nantgaredig RFC | 18 | 1 | 6 | 347 | 270 | +77 | 8 | 54 |
| Fall Bay RFC | 18 | 1 | 8 | 337 | 334 | +3 | 5 | 43 |
| Pontrhydyfen RFC | 18 | 0 | 10 | 321 | 430 | -109 | 6 | 38 |
| Llangadog RFC | 18 | 1 | 10 | 383 | 434 | -51 | 7 | 37 |
| Pantyffynnon RFC | 18 | 1 | 10 | 343 | 390 | -47 | 6 | 36 |
| Aberavon Naval RFC | 18 | 0 | 15 | 206 | 518 | -312 | 4 | 16 |
| South Gower RFC | 18 | 0 | 16 | 190 | 657 | -467 | 6 | 14 |
| Correct as of 17 May 2009 | Correct as of 17 May 2009 | Correct as of 17 May 2009 | Correct as of 17 May 2009 | Correct as of 17 May 2009 | Correct as of 17 May 2009 | Correct as of 17 May 2009 | Correct as of 17 May 2009 | Correct as of 17 May 2009 |
Question:
How many rounds were played in the matching resulting in a Points For score of 343?
Answer:
18.0