anyone that can help me on this question?

right now in the field the calculated value is

round(perfOwned ; 2)*100

right now if output is 4 digit it will output 2500, 5000, and 5 digit it will output 10000

I'm trying to have the 4 digit numbers to output 02500 instead of 2500 and 5 digit output normally.

anyone that can help me with this?

look at this thread and adapt : Formula per trasformare numeri in testo con minimo di 3 cifre (es. da 1 a 001)