ADE 7880 EQUATION 49 description

Hello EngineerZone experts,
Hope u are doing well. I am trying to configure ADE7880 REGESTERS. one of this regs is CFxDEN register.
I cant understand equation 49 {CFxDEN = (1000)/(MC*10^n)}. The equation has 3 passive elements. Can u explain?


best regards
Hossam