code: def multiply(**kwargs):
      
      result = 1
      for i in list(kwargs.values()):
          if not i:
              # If one value is null, we return null.
              return i
          result *= i
      return result
docs: Simple postprocessor where we multiply the input values.
  
      :param kwargs: Dictionary of values to multiply
      :type kwargs: dict
  
      :return: The result.
      :rtype: float