28 Divide the difference between 1.4 and 3.5, what is the result?
28除1.4与3.5的差，结果是多少？
<gadget id="calculator">3.5 - 1.4</gadget>
<output>2.1</output>

<gadget id="calculator">2.1 / 28</gadget>
<output>0.075</output>

<result>0.075</result>