3**3*2**2=how much.
3**3*2**2=多少．
<gadget id="calculator">3 ** 3</gadget>
<output>27</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">27 * 4</gadget>
<output>108</output>

<result>108</result>