How many multiples of 9 are there in the open interval (π^5, π^6)?

Hello, musngiburger!
Are you waiting for someone to provide a formula?
It is just requires a little Thinking.
How many multiples of 9 are there in the open interval![]()
Use your calculator: .
The interval contains the integers:.. . . 655 integers.
One-ninth of them are multiple of 9: .