An article has 20 lines, each line has 30 characters, and it takes Xiaoqiao 10 minutes to type this article. How many words does Xiaoqiao type per minute?
一篇文章有20行，每行30个字，小巧用10分钟打完这篇文章，小巧每分钟打多少个字？
<gadget id="calculator">20 / 10</gadget>
<output>2</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<result>60</result>