Teacher Li can type 240 characters in 3 minutes, how many characters can he type in half an hour?
李老师3分钟打240个字，半小时能打多少个字？
<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">80 * 30</gadget>
<output>2_400</output>

<result>2_400</result>