Problem:
Output format for a custom field (number)

Solution:
You will require to write the custom shortcode that should return the formatted number as per your requirement.

You can find the proposed solution in this case with the following reply:
=> https://toolset.com/forums/topic/output-format-for-a-custom-field-number/#post-1796473

Relevant Documentation:
=> https://toolset.com/documentation/adding-custom-code/using-toolset-to-add-custom-code/