Currently, when we use time estimates in automation we need to check the work hours mentioned in the “Global Time tracking parameters" and then convert it into seconds and use it.
eg:
{[issue.timetracking.remainingEstimateSeconds.divide(288000}}

In the above example, we use 28,800 secs for the calculations since the work hours per day are set to 8 in the global settings.

If there are multiple automation on the site and in case the work hours per day change to 7 or 6 in future. Users will have to make changes to all the automation rules related to time tracking.

It would be helpful to have a smart value that picks the Working hours per day from the Global time tracking settings which can be used in the automation rules.