How to Automatically shows the output without clicking save

Hello, I was wondering if theirs a feature in Form where it automatically shows the output without clicking save.

for example (RED) is the date fields where I want to get the inputs.
the “Current Address To” field is automatically showing the current date and the “Current Address From” field is where i want to get the data from.
and the (GREEN) is an equation field where i want to see the output.
I already have the computation for (GREEN).

so what i was wondering was, if its possible to automatically show the output of GREEN while entering a value in the “Current Address From” field without clicking save?

another example is this:

i entered a date value on “Current Address From” field and it automatically computes the output and shows “7” without clicking refresh or save