PVS-Studio warning V636 for DDKSamples

NTSTATUS
KcsAddTrignometricInstance (....)
{
  ....
  Angle = (double)(Timestamp.QuadPart / 400000) *
          (22/7) / 180;
  ....
}

This suspicious code was found in DDKSamples project by PVS-Studio static code analyzer.
Warning message is:
V636 The '22 / 7' expression was implicitly casted from 'int' type to 'double' type. Consider utilizing an explicit type cast to avoid the loss of a fractional part. An example: double A = (double)(X) / Y;. kcs.c 239

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