Yang Yang went to bed at 9:00 in the evening and got up at 6:30 the next morning. How much sleep did he have in total? (fill in time)
阳阳晚上9：00开始睡觉，第二天早上6：30起床，他一共睡了多少．(填时间)
<gadget id="calculator">3 + 6.5</gadget>
<output>9.5</output>

<result>9.5</result>