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:
| Game | Date | Opponent | Result | Raiders points | Opponents | Raiders first downs | Record | Attendance |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Sept. 22 | at Miami Dolphins | Win | 31.0 | 21.0 | 17.0 | 1–0 | 78744.0 |
| 2.0 | Sept. 28 | at Baltimore Colts | Win | 31.0 | 20.0 | 18.0 | 2–0 | 40657.0 |
| 3.0 | Oct. 5 | at San Diego Chargers | Win | 6.0 | 0.0 | 17.0 | 3–0 | 31095.0 |
| 4.0 | Oct. 12 | at Kansas City Chiefs | Loss | 10.0 | 42.0 | 23.0 | 3–1 | 60425.0 |
| 5.0 | Oct. 19 | at Cincinnati Bengals | Loss | 10.0 | 14.0 | 18.0 | 3–2 | 48122.0 |
| 6.0 | Oct. 26 | San Diego Chargers | Win | 25.0 | 0.0 | 23.0 | 4–2 | 42796.0 |
| 7.0 | Nov. 2 | at Denver Broncos | Win | 42.0 | 17.0 | 21.0 | 5–2 | 52505.0 |
| 8.0 | Nov. 9 | New Orleans Saints | Win | 48.0 | 10.0 | 34.0 | 6–2 | 51267.0 |
| 9.0 | Nov. 16 | Cleveland Browns | Win | 38.0 | 17.0 | 22.0 | 7–2 | 50461.0 |
| 10.0 | Nov. 23 | at Washington Redskins | Win | 26.0 | 23.0 | 26.0 | 8–2 | 53582.0 |
| 11.0 | Nov. 30 | Atlanta Falcons | Win | 37.0 | 34.0 | 33.0 | 9–2 | 50860.0 |
| 12.0 | Dec. 8 | Denver Broncos | Win | 17.0 | 10.0 | 16.0 | 10–2 | 51075.0 |
| 13.0 | Dec. 14 | Houston Oilers | Loss | 26.0 | 27.0 | 23.0 | 10–3 | 50719.0 |
Question:
How many opponents played 1 game with a result win?
Answer:
21.0