What is the quotient of the sum of 9 plus 12 divided by 7? What is the correct column
9加12的和再除以7，商是多少？正确列式是多少
<gadget id="calculator">9 + 12</gadget>
<output>21</output>

<gadget id="calculator">21 / 7</gadget>
<output>3</output>

<result>3</result>