Physics

Oxygen has a molar mass of 32 g/mol. If 12 moles of oxygen are in a 0.1-m3 container with an rms speed of 480 m/s, what is the pressure of the gas?
I don't understand what I'm doing wrong Im using p=nM(vrms^2)/3V
and im getting 2.9E8?
someone pls explain

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