preview – How do I turn a pdf (4meter x 24 centi-meters) into a multipage pdf?

I have a very long pdf file.
Spat our by anytrans of texts.
the file is searchable but is not readable by normal people. Yes, I asked anytrans why their app does give a page size option. They said that they don’t see anything wrong.

any way. I would like to split the document into a multipage document. Like A4. I’m on a mac and have Adobe, but would like to use anything to solve this problem, except a pc. I do not have access.

and I still need to search the text.