Available Commands:

• multiply - Calculates product of digits.
• insert - Inserts result.
• insert zero - Inserts a zero.
• add - Adds partial products to get final sum.
• move <obj> left - Moves 'top', 'bottom', or 'pencil'.
• move pencil right - Moves pencil to the far right.
• repeat(n) - Starts a loop (use indentation).