There are 720 words in an article, and if it needs to be typed in 9 minutes, how many words should be typed per minute on average?
一篇文章有720个字，要在9分钟内打完，平均每分钟要打多少字？
<gadget id="calculator">720 / 9</gadget>
<output>80</output>

<result>80</result>