You have one (1) VGA output.... connect that to monitor #1
You have two DVI-ports.... buy two (2) DVI to VGA adapters.... then connect to monitor #2 and monitor #3 (these are cheap, few bucks each, usually get one in the box with the GPU card too...)
Now, with that card you certainly can't Game on triple monitors but can do office work. You'll have to look into the NVidia control panel to see IF / How you configure your desktop for multiple monitors once you hook 'em all up....