If 3X=18, then 5X-2=how much.
若3X=18，那么5X-2=多少．
<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">30 - 2</gadget>
<output>28</output>

<result>28</result>