Calculation: 17*23-23*17.
计算：17*23-23*17．
<gadget id="calculator">17 * 23</gadget>
<output>391</output>

<gadget id="calculator">23 * 17</gadget>
<output>391</output>

<gadget id="calculator">391 - 391</gadget>
<output>0</output>

<result>0</result>