What is the result of dividing the sum of 1.3 and 8.7 by their difference?
1.3与8.7的和除它们的差，结果是多少？
<gadget id="calculator">8.7 - 1.3</gadget>
<output>7.4</output>

<gadget id="calculator">8.7 + 1.3</gadget>
<output>10</output>

<gadget id="calculator">7.4 / 10</gadget>
<output>0.74</output>

<result>0.74</result>