How do I set a subform to repeat based on a value chosen from a dropdown list?

Please forgive me if this is covered somewhere, but I have spent a few hours searching and have not come up with anything.

I have a dropdown list that allows the user to select the number of teams registering (1-5). I then have a subform with all the information needed for each team. I would like the subform to automatically repeat based on the number selected from the dropdown, since I need that information for each of the teams registering.

Thanks!