I would like to open a Excel file from Power Point.

The Excel file is a designed spread sheet with Graphics and works as a
calculator.

Can I somehow embed the Excel file with all it's functionality in
PowerPoint, so you don't have to leave the presentation?

Or, can the Excel file open in a new window, without disturbing the
presentation. That would mean I have to save the Excel file in a way
that it opens with out showing the Excel program, but it's
functionality is still working.

Is there any way to see some samples if it can be done at all.

Thanks, Dimitri