14.529+(2.471-2.1)=how much.
14.529+(2.471-2.1)=多少．
<gadget id="calculator">2.471 - 2.1</gadget>
<output>0.371</output>

<gadget id="calculator">14.529 + 0.371</gadget>
<output>14.9</output>

<result>14.9</result>