code: def inasafe_place_value_coefficient(number, feature, parent):
      
      _ = feature, parent  # NOQA
  
      if number >= 0:
          rounded_number = round_affected_number(
              number,
              use_rounding=True,
              use_population_rounding=True
          )
          min_number = 1000
          value, unit = denomination(rounded_number, min_number)
          if number < min_number:
              rounded_number = int(round(value, 1))
          else:
              rounded_number = round(value, 1)
          return str(rounded_number)
      else:
          return None
docs: Given a number, it will return the coefficient of the place value name.
  
      For instance:
      *  inasafe_place_value_coefficient(10) -> 1
      *  inasafe_place_value_coefficient(1700) -> 1.7
  
      It needs to be used with inasafe_number_denomination_unit.