Using Variables in Etext template

Summary:

Hi Team,

I was reviewing a oracle guide for etext template. For one of my requirement I am trying to use Variables in etext template.

GetVar(var-name)

ResetVar(var-name)

 SetVar(var-name, value-to-be-assigned)

Click here : Creating eText Templates (oracle.com)

My requirement is to print a single record into multiple times based on a field(number) output which vacant positions available in the same record. It is a calculated field and could be varry from one record to another.

existing and expected requirement snap attached below.

I am trying to use the variable functions into etext template, however I don't find any proper example.