yes, this is correct
It would really help if you provided a screenshot of your relevant blocks including Do it result of your Duration, so we can see what you are trying to do, and where the problem may be.
To get an image of your blocks, right click in the Blocks Editor and select "Download Blocks as Image". You might want to use an image editor to crop etc. if required. Then post it here in the community.
use Do it to debug your blocks, see also tip 4 here https://puravidaapps.com/learn.php
see also Live Development, Testing, and Debugging Tools
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun.