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Calculate VRMSOS in ADE7878

Hi,
I am trying to complte a calibration for ADE7878 using AN-1076.
There were no problems with the VGAIN (IGAIN) registers calibration,
but with offset calibration (VRMSOS) there were difficulties.
I have the following initial data:
 Vmin = 38(V)
 VRMSmin = 441193
 Vn = 221(V)
 VRMSn = 2622978
 
Using the formula on page 6 AN-1076 i calculate VRMSOS = 70511001,
but how to present this number in 24-bit hexadecimal representation.
The calculated value is too large for a 24-bit hexadecimal representation,
what am i doing wrong?

Regards,

Sergey