If 3x+2=11, then 6.5x-5=how much.
如果3x+2=11，那么6.5x-5=多少．
<gadget id="calculator">11 - 2</gadget>
<output>9</output>

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

<gadget id="calculator">6.5 * 3</gadget>
<output>19.5</output>

<gadget id="calculator">19.5 - 5</gadget>
<output>14.5</output>

<result>14.5</result>