Multiplication

operand1 * operand2

• If operand1 and operand2 both result in numbers, the expression results in operand1 multiplied by operand2.
• If operand1 and operand2 both result in collections the result is the Cartesian Product of the two sets corresponding to the two collections. (Not yet implemented.)
• Otherwise the expression results in Undefined.

For example:

  2 * 2 = 4
  4 * 0.5 = 2
  0.5 * 4 = 2
  4.4 * 0.5 = 2.2
  `ab'*`cd' = {[`a' `c'] [`a' `d'] [`b' `c'] [`b' `d']}