Contact Form 7 – Can I calculate the difference between 2 fields

I’m completely new to WordPress and plugins, so please forgive me if this has been answered somewhere else.

I’m using contact form 7 as a booking facility and have also activated the Contact Form 7 Calendar plugin to add date pickers (arrival and departure dates).

Is it possible to create a field that adds the number of days or nights between the two dates?

Many thanks

https://www.ads-software.com/extend/plugins/contact-form-7/