What is the product of the sum of 2.5 and 1.1 times the difference between 4.7 and 4.2?
2.5与1.1的和乘以4.7与4.2的差，积是多少？
<gadget id="calculator">2.5 + 1.1</gadget>
<output>3.6</output>

<gadget id="calculator">4.7 - 4.2</gadget>
<output>0.5</output>

<gadget id="calculator">3.6 * 0.5</gadget>
<output>1.8</output>

<result>1.8</result>