X-0.8X-6=16．
X-0.8X-6=16．
<gadget id="calculator">16 + 6</gadget>
<output>22</output>

<gadget id="calculator">1 - 0.8</gadget>
<output>0.2</output>

<gadget id="calculator">22 / 0.2</gadget>
<output>110</output>

<result>110</result>