What is the quotient of the sum of 7.8 and 4.6 divided by their difference?
7.8与4.6的和，除以它们的差，商是多少？
<gadget id="calculator">7.8 + 4.6</gadget>
<output>12.4</output>

<gadget id="calculator">7.8 - 4.6</gadget>
<output>3.2</output>

<gadget id="calculator">12.4 / 3.2</gadget>
<output>3.875</output>

<result>3.875</result>