Personal hotspot & wireless router?

I've just moved into a new apartment and there's no internet here yet. I have an iPhone with unlimited data and we have 3 computers, 2 of them are Wi-Fi enabled and a wireless router that's connected to the wired computer. The question is how to make the router connect to the iPhone via wi-fi and re-translate internet to all 3 computers.

Added (1). I need to share the internet connection via wi-fi WITH my router (belkin f5d8633-4) and not other devices.

Personal Hotspot refers to the Internet-sharing feature on iPhone 3GS or later, iPad (3rd generation) Wi-Fi + Cellular or later, and iPad mini Wi-Fi + Cellular. This article explains how to share your cellular data connection using Personal Hotspot. Refer to the User Guide for additional information on Personal Hotspot.

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