workflow designer – How to copy a search column to another column

I would like to calculate a search field. I'm trying to figure out how to copy the monitoring field to the help of the workflow. I found some tips, but they were using the 2010 workflow, which Access continues to be denied when I tried to save or publish. Is it possible to do this using the 2013 workflow platform?

I have a column with a number on a list. And the second list assumes to loop this number and use it to calculate the expiration date from the start date.

I've tried using the update list, but it seems to go on and on.