Xiaohong's mother works from 8:00 to 11:30 in the morning and from 2:30 to 5:00 in the afternoon. How many hours does Xiaohua's mother work a week? (2 days off a week)
小红妈妈的上班时间是上午8：00～11：30，下午2：30～5：00．小华妈妈一周工作多少小时？(一周休息2天)
<gadget id="calculator">7 - 2</gadget>
<output>5</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<result>30</result>