Calc - The ability to open multiple spreadsheets in one instance of Calc

[miketurn]

When I first started using Excel I hated the fact that it opened up spreadsheets in one instance of itself.
Now I have gotten used to that and Calc seems to do the opposite, if you open up more than one spreadsheet file it opens up multiple instances of Calc.
Is there a way to have Calc open multiple spreadsheets in one instance of itself?

Thank You

[mariosv]

No, there is an old request https://bugs.documentfoundation.org/show_bug.cgi?id=37134