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:
| Home team | Home team score | Away team | Away team score | Venue | Crowd | Date |
| --- | --- | --- | --- | --- | --- | --- |
| North Melbourne | 9.13 (67) | St Kilda | 15.13 (103) | Arden Street Oval | 17261.0 | 7 May 1966 |
| Richmond | 18.15 (123) | Melbourne | 11.14 (80) | MCG | 32608.0 | 7 May 1966 |
| South Melbourne | 14.22 (106) | Hawthorn | 7.15 (57) | Lake Oval | 17259.0 | 7 May 1966 |
| Geelong | 12.14 (86) | Footscray | 7.4 (46) | Kardinia Park | 17395.0 | 7 May 1966 |
| Essendon | 8.18 (66) | Collingwood | 8.6 (54) | Windy Hill | 43487.0 | 7 May 1966 |
| Fitzroy | 6.8 (44) | Carlton | 10.16 (76) | Brunswick Street Oval | 16714.0 | 7 May 1966 |
Question:
What is the smallest crowd size for an away team that scored 7.15 (57)?
Answer:
17259.0