A storybook with 144 pages in total, Xiaojuan finished it in 8 days and Xiaodong finished it in 12 days. On average, how many more pages does Xiaojuan read every day than Xiaodong?
一本共144页的故事书，小娟8天看完，小冬12天看完．小娟比小冬平均每天多看多少页？
<gadget id="calculator">144 / 8</gadget>
<output>18</output>

<gadget id="calculator">144 / 12</gadget>
<output>12</output>

<gadget id="calculator">18 - 12</gadget>
<output>6</output>

<result>6</result>