Teacher Liu's watch is 2 minutes behind Beijing time every hour. One night at 10:00, Mr. Liu aligned his watch, and at 8:00 Beijing time the next morning, the time displayed on the watch was 7:00 or so.
刘老师的手表每小时比北京时间慢2分钟．某天晚上10点整，刘老师将手表对准，到第二天上午北京时间8点的时候，手表显示的时间是7点多少分．
<result>40</result>