Printing large postscript pages

[Rick]

I have a postscript file (created with xfig) that I would like to magnify and 
print on my HP Officejet 6500.  The original fits on a standard letter-size page.  
I would like to magnify it by 300% and print it on a total of 9 pages (a 3 x 3 
grid).  I will then be able to tape the 9 pieces together into a single large 
page.

Is there any way to do this?

Many thanks in advance!

Regards,
Rick