The difference between 7.8 and 6.2 is multiplied by their sum, what is the product?
7.8与6.2的差去乘它们的和，积是多少？
<gadget id="calculator">7.8 - 6.2</gadget>
<output>1.6</output>

<gadget id="calculator">7.8 + 6.2</gadget>
<output>14</output>

<gadget id="calculator">1.6 * 14</gadget>
<output>22.4</output>

<result>22.4</result>