Multiply the sum of 14..81 and 5.19 by their difference, what is the product?
用14..81与5.19的和，乘以它们的差，积是多少？
<gadget id="calculator">14.81 + 5.19</gadget>
<output>20</output>

<gadget id="calculator">14.81 - 5.19</gadget>
<output>9.62</output>

<gadget id="calculator">20 * 9.62</gadget>
<output>192.4</output>

<result>192.4</result>