Yang Ling is a primary school student. According to regulations, her school time does not exceed 6 o'clock every day. In one semester (calculated as 20 weeks), her school time does not exceed the maximum number of hours.
杨玲是一名小学生，按规定在校上学时间每天不超过6时，一学期(按20周计算)她在校上学的时间，最多不超过多少时．
<gadget id="calculator">6 * 5 * 20</gadget>
<output>600</output>

<result>600</result>