If 5x+3=31, then 12x-8=how much.
如果5x+3=31，那么12x-8=多少．
<gadget id="calculator">31 - 3</gadget>
<output>28</output>

<gadget id="calculator">28 / 5</gadget>
<output>28/5 = around 5.6</output>

<gadget id="calculator">12 * (28/5)</gadget>
<output>336/5 = around 67.2</output>

<gadget id="calculator">(336/5) - 8</gadget>
<output>296/5 = around 59.2</output>

<result>296/5 = around 59.2</result>