22*22*22-22*22-21=how much.
22*22*22-22*22-21=多少．
<gadget id="calculator">22 * 22 * 22</gadget>
<output>10_648</output>

<gadget id="calculator">22 * 22</gadget>
<output>484</output>

<gadget id="calculator">10_648 - 484 - 21</gadget>
<output>10_143</output>

<result>10_143</result>