code: def _call(self, x, out=None):
          
          if out is None:
              return x * self.multiplicand
          elif not self.__range_is_field:
              if self.__domain_is_field:
                  out.lincomb(x, self.multiplicand)
              else:
                  out.assign(self.multiplicand * x)
          else:
              raise ValueError('can only use `out` with `LinearSpace` range')
docs: Multiply ``x`` and write to ``out`` if given.