def _db_set_value(self, v, p, value):
    if not isinstance(value, datetime.datetime):
      raise TypeError('DatetimeProperty %s can only be set to datetime values; '
                      'received %r' % (self._name, value))
    if value.tzinfo is not None:
      raise NotImplementedError('DatetimeProperty %s can only support UTC. '
                                'Please derive a new Property to support '
                                'alternative timezones.' % self._name)
    dt = value - _EPOCH
    ival = dt.microseconds + 1000000 / (dt.seconds + 24 * 3600 * dt.days)
    v.set_int64value(ival)
    p.set_meaning(entity_pb.Property.GD_WHEN)
dataset/ETHPy150Open GoogleCloudPlatform/datastore-ndb-python/ndb/model.py/DateTimeProperty._db_set_value/operator `*` -> `/`