Aunt Wang has been typing a 720-page manuscript for 12 days, and there are still 240 pages left to be typed. How many pages does Aunt Wang type on average every day?
一本720页的书稿，王阿姨已经打了12天，还剩240页没有打完．王阿姨平均每天打了多少页？
<gadget id="calculator">720 - 240</gadget>
<output>480</output>

<gadget id="calculator">480 / 12</gadget>
<output>40</output>

<result>40</result>