Xiaoli's mother goes to work at 8:00 in the morning, leaves work at 11:30 in the afternoon, goes to work at 1:30 in the afternoon, and leaves work at 6:00 in the evening. How many hours does she work a day.
小丽的妈妈早上8：00上班，中午11：30下班，下午1：30分上班，傍晚6：00下班．她一天要工作多少小时．
<result>8</result>