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 |
| --- | --- | --- | --- | --- | --- | --- |
| Melbourne | 18.15 (123) | North Melbourne | 15.12 (102) | MCG | 8662.0 | 24 May 1930 |
| Footscray | 9.10 (64) | Richmond | 14.7 (91) | Western Oval | 20000.0 | 24 May 1930 |
| Essendon | 14.12 (96) | Hawthorn | 8.13 (61) | Windy Hill | 15000.0 | 24 May 1930 |
| Collingwood | 10.12 (72) | Geelong | 12.18 (90) | Victoria Park | 17000.0 | 24 May 1930 |
| Carlton | 20.18 (138) | South Melbourne | 11.18 (84) | Princes Park | 21000.0 | 24 May 1930 |
| St Kilda | 15.18 (108) | Fitzroy | 8.10 (58) | Junction Oval | 26000.0 | 24 May 1930 |
Question:
When richmond played away, what was the largest number of people who watched?
Answer:
20000.0