Unable to use format value activity

Hi,
I have used linq for some filtering of Excel data. after that when I write the data into excel(write range) the format is not correct.
Ex: 0023 is being written as 23. it is removing all the zeros. The format is not preserved. I tried using format value activity but it’s not working. How can I preserve the same format without appending any zeros to that column?
Thank you in advance