Zero padding numbers in text output from a source XML

I am trying to figure out how to zero pad numbers on text output from
a source XML document.

Problem:
The format of the element on the xml file must be '########.00'.

Input:
<foo>
<bar>1234.56</bar>
</foo>

But the output on the text file must be placed in a fixed position as
follows. Notice there is no separator between the whole and fractional
components.

Output:
0000123456

Garvin
garvin_franco@xxxxxxxxxxx

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