A typing competition was held in a certain class. Xiao Hai typed 480 characters in 15 minutes, and Xiao Li typed 480 characters in 12 minutes. How many more words does Xiaoli type per minute than Xiaohai?
某班上开展打字比赛，小海15分钟打了480个字，小丽12分钟打了480个字．小丽比小海每分钟多打多少个字？
<gadget id="calculator">480 / 12</gadget>
<output>40</output>

<gadget id="calculator">480 / 15</gadget>
<output>32</output>

<gadget id="calculator">40 - 32</gadget>
<output>8</output>

<result>8</result>