What is the quotient of the difference between 4.5 and 1.1 divided by the sum of 10 and 8.7?
4.5与1.1的差除10与8.7的和，商是多少？
<gadget id="calculator">10 + 8.7</gadget>
<output>18.7</output>

<gadget id="calculator">4.5 - 1.1</gadget>
<output>3.4</output>

<gadget id="calculator">18.7 / 3.4</gadget>
<output>5.5</output>

<result>5.5</result>