It is known that 2x=8, then 3x-2=how much
已知2x=8，则3x-2=多少
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">12 - 2</gadget>
<output>10</output>

<result>10</result>