What is the quotient of the sum of (2/5) and (1/3) divided by their difference?
(2/5)与(1/3)的和除以它们的差，商是多少？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/5) + (1/3)</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">(2/5) - (1/3)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(11/15) / (1/15)</gadget>
<output>11</output>

<result>11</result>