What is the quotient of the sum of 3 and 1.5 divided by their difference?
3与1.5的和除它们的两数差，商是多少？
<gadget id="calculator">3 - 1.5</gadget>
<output>1.5</output>

<gadget id="calculator">3 + 1.5</gadget>
<output>4.5</output>

<gadget id="calculator">1.5 / 4.5</gadget>
<output>0.333333</output>

<result>0.333333</result>