2.23*2**2*3**2*5**2=how much.
2.23*2**2*3**2*5**2=多少．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">2.23 * 4 * 9 * 25</gadget>
<output>2_007</output>

<result>2_007</result>