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:
| Week | Date | Opponent | Result | Attendance |
| --- | --- | --- | --- | --- |
| 1.0 | September 29, 1957 | Philadelphia Eagles | W 17-13 | 62506.0 |
| 2.0 | October 6, 1957 | at San Francisco 49ers | L 23-20 | 59637.0 |
| 3.0 | October 13, 1957 | at Detroit Lions | L 10-7 | 55914.0 |
| 4.0 | October 20, 1957 | at Chicago Bears | L 34-26 | 47337.0 |
| 5.0 | October 27, 1957 | Detroit Lions | W 35-17 | 77314.0 |
| 6.0 | November 3, 1957 | Chicago Bears | L 16-10 | 80456.0 |
| 7.0 | November 10, 1957 | San Francisco 49ers | W 37-24 | 102368.0 |
| 8.0 | November 17, 1957 | at Green Bay Packers | W 31-27 | 19540.0 |
| 9.0 | November 24, 1957 | at Cleveland Browns | L 45-31 | 65407.0 |
| 10.0 | December 1, 1957 | at Baltimore Colts | L 31-14 | 52060.0 |
| 11.0 | December 8, 1957 | Green Bay Packers | W 42-17 | 70572.0 |
| 12.0 | December 15, 1957 | Baltimore Colts | W 37-21 | 52560.0 |
Question:
Which Week has an Opponent of san francisco 49ers?
Answer:
7.0