Routers

Hello I am confuse about express.routers and I need help. So please, help me.

When we have a database, how many express.routers do we need to create ?

Do I need to create an express.routers for each product and each informational view ?
Or is it dependent from the tables of the database ?

Thank you very much in advance.

https://www.codecademy.com/journeys/full-stack-engineer/paths/fscj-22-back-end-development/tracks/fscj-22-build-a-back-end-with-express-js/modules/wdcp-22-learn-express-routes-65185abe-3c94-42fc-af9c-b4f92a1161a2/lessons/learn-express-routers/exercises/routers-review