You don't give a context for where you want to use this value. I am assuming you want it in some save- or send- template.
One way using
general program mode:
Code:
program: re(format_number(field('series_index'), '{0:05.2f}'), '\.00', '')
You would add any other fields to re's return value as needed, possibly using the template or finish_formatting functions.
Another way using
template program mode:
Code:
{:'template("program: re(format_number(field('series_index'), '[[0:05.2f]]'), '\.00', '')")'}
Using "template" is required here because you cannot use { and } in template program mode and these characters are required by format_number. The template function converts the [[ and ]] to { and }.
Yet another way: write your own
user defined template function to do what you want.