Profit calculation based on HW

Hi all,

I am trying to get as accurate as possible on my predictions and before buying any mining equipment I am using different websites where the ask for Hashing Power, Power consumption and cost per KWh.

The plan being to buy a workstation and install as many NVIDA GTX 3090 as possible:

This card seems to have a Hashing Power of 120MH/s at 300w power consumption. If I have 5 cards, will it be safe to multiply 120×5 and 300×5 to get the metrics?

Thanks