That is not pretty simple!
Mac OS 9 only runs on a Mac with a PowerPC processor.
Parallels supports only operating systems that run on an Intel/AMD processor.
Therefore it's very unlikely that Parallels will make it possible to run Mac OS 9 in a Parallels VM .
You can however try SheepShaver
More information: Run MacOS 9 on an Intel Mac
Good luck.
Mac OS 9 only runs on a Mac with a PowerPC processor.
Parallels supports only operating systems that run on an Intel/AMD processor.
Therefore it's very unlikely that Parallels will make it possible to run Mac OS 9 in a Parallels VM .
You can however try SheepShaver
More information: Run MacOS 9 on an Intel Mac
Good luck.