Regarding text()

I have a question about the text() function.
When I used "#" in the second argument to text(), the following behavior occurred.
When I tried to match the digits and separators to the format,
the numbers after the decimal point changed.
The documentation says that "#" is a format for numbers,
but does it also convert the numbers themselves?

・document

docs.appian.com/.../fnc_text_text.html

↓exmaple
text("12,333,333,333,333.12","##,###,###,###,###.##")　→　"12,333,333,333,333.11" is returned.