how to lpad 0 to a field decimal(6,0)

Hi

I am mapping a  decimal(6,0) field to decimal(6,0) field and finds that some of the source data have only 5 digits.I needed to place a 0 in front of those numbers that doesnt have 6 digits.

I tried lpad and dint work.

I tried 0|| field name dint work

Any suggestions?

Cheers