What is the product of the sum of 5.6 and 3.8 multiplied by their difference?
5.6与3.8的和乘它们的差，积是多少？
<gadget id="calculator">5.6 + 3.8</gadget>
<output>9.4</output>

<gadget id="calculator">5.6 - 3.8</gadget>
<output>1.8</output>

<gadget id="calculator">9.4 * 1.8</gadget>
<output>16.92</output>

<result>16.92</result>