Insert hyphens between a string

[Marcia]

Hi. I have a column with numbers typed as
3000100123


I need to add zero before the first character, insert a hyphen after the first char, and insert another hyphen after the fifth, like
03-0001-00123
What I did to get the desired result was to create 5 helper columns parsing the numbers then joining them all. At first I tried creating a formula but gave up. How should I do it with a formula?
Thank you.

[ArviLaanemets]

Like

=TEXT(A1,"00-0000-00000")

[Marcia]

Originally Posted by ArviLaanemets

Like

=TEXT(A1,"00-0000-00000")

This simple? My experiments went to LEFT, RIGHT, LEN.... etc. This is the solution to my other problem of joining a data in percentage format with a text.
Thank you Arvi.