What is the quotient of the sum of 900 and 600 divided by their difference?
900与600的和，除以它们的差，商是多少．
<gadget id="calculator">900 + 600</gadget>
<output>1_500</output>

<gadget id="calculator">900 - 600</gadget>
<output>300</output>

<gadget id="calculator">1_500 / 300</gadget>
<output>5</output>

<result>5</result>