How can I format numbers in a calculated field?

For instance instead of 11100000 I would like to format it this way 11.100.000 (eleven-million-one-hundred-thousand)

As the calculation widget only takes numeral values from the operands (when doing arithmetic calculations not string concatenation).

Therefore, the input mask CANNOT be retained. Sorry about that.

As a work around you could use another text box with a mask and create a condition to update that value.

Result, input mask is used in the output:

Please let us know if this helps.