It is stipulated that A*B=A*B+AB, then 5*6=how much.
规定A※B=A*B+A-B，那么5※6=多少．
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">5 - 6</gadget>
<output>-1</output>

<gadget id="calculator">30 + (-1)</gadget>
<output>29</output>

<result>29</result>