Aunt Li needs to type a document within 7 minutes. This document has 4 pages and 133 characters per page. How many characters does she have to type per minute on average?
李阿姨要在7分钟内打完一份文件，这份文件有4页，每页133个字，她平均每分钟要打多少个字？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">133 * (4/7)</gadget>
<output>76</output>

<result>76</result>