Measure to calulate number of nights from two date columns

We have scenario where we need to calculate number of nights by using two date columns.

Challenge is when we select the date range from slicers (of both the columns), if one of the columns condition don't returns true, it will skip that complete record

For example:

We need to calculate number of night for period From Date='02/Jan/2020' - To Date='09/Jan/2020'

By selecting these dates from both date slicers of "From Date" & "To Date", result would be:

It would be a great solution if we get Measure which works with one date slicer to select the date range and gives desire output.

Thanks

Ali