The position of how many letters in the word RAINBOW will remain unchanged when they are arranged in alphabetical order?

Let's match the original word with its letters rearranged in alphabetical ascending order:
| Original Position | Letter in RAINBOW | Letter in Alphabetical Order | Status |
| --- | --- | --- | --- |
| 1 | R | A | Changed |
| 2 | A | B | Changed |
| 3 | I | I | Unchanged |
| 4 | N | N | Unchanged |
| 5 | B | O | Changed |
| 6 | O | R | Changed |
| 7 | W | W | Unchanged |

The positions of exactly three letters ($\text{I}$, $\text{N}$, and $\text{W}$) remain unchanged.