Xiao Li arrives at school at 8:30 in the morning, leaves school at 11:30 in the afternoon, arrives at school at 2:10 in the afternoon, and leaves school at 5:10 in the evening. How many hours does he spend in school in one day?
小力上午8：30到校，中午11：30放学，下午2：10到校，晚上5：10放学，他一天在校时间共多少小时．
<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<result>6</result>