Calculation: 40/3**2=how much.
计算：40/3**2=多少．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">40 / 9</gadget>
<output>40/9 = around 4.444444</output>

<result>40/9 = around 4.444444</result>