You were lied to, or you seriously misunderstood. Who did you buy from?

These are tested at 200MHz, with a practical max of 275MHz. With 55 cores per ASIC and 8 ASICs per board, that's GH=0.44*MHz for 275MHz clocking in at a theoretical peak of 121GH.

Under pretty ideal cooling and power conditions, the BM1384 ASIC is good to around 500MHz which means the absolute best case liquid-cooled-miracle performance for this device could only be 220GH, still less than half what you want.

(in case you're wondering, I designed and built the R808 so I know more than "them")