Column calculation: 18 divided by the sum of 2 and 7, what is the quotient?
列式计算：18除以2与7的和，商是多少？
<gadget id="calculator">2 + 7</gadget>
<output>9</output>

<gadget id="calculator">18 / 9</gadget>
<output>2</output>

<result>2</result>