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 | 11.8 (74) | Richmond | 9.12 (66) | Arden Street Oval | 20257.0 | 24 May 1975 |
| Fitzroy | 13.13 (91) | South Melbourne | 11.12 (78) | Junction Oval | 12010.0 | 24 May 1975 |
| Carlton | 16.14 (110) | Melbourne | 11.15 (81) | Princes Park | 18788.0 | 24 May 1975 |
| St Kilda | 7.23 (65) | Footscray | 7.12 (54) | Moorabbin Oval | 16838.0 | 24 May 1975 |
| Essendon | 7.13 (55) | Collingwood | 12.9 (81) | Windy Hill | 31986.0 | 24 May 1975 |
| Hawthorn | 17.11 (113) | Geelong | 5.10 (40) | VFL Park | 23466.0 | 24 May 1975 |
Question:
How big was the crowd of away team Richmond?
Answer:
20257.0