It looks like your query is a bit unclear. If you're asking:

• How many days is 9?
  If you mean "9 days," then it is simply 9 days.

• How many days are in 9 weeks?
  9 weeks × 7 days/week = 63 days.

• How many days are in 9 months?
  This varies depending on the months, but on average:
  9 months × ~30.44 days/month ≈ 274 days.

If you meant something else, please clarify!