At a certain time between 8:00 and 9:00 in the morning, Xiao Ming set off from home to go out to play. At this time, he found that the hour and minute hands on the watch coincided. Sometime between 2:00 and 3:00 in the afternoon, Xiao Ming returned home when he found that the hour and minute hands on the watch were pointing in exactly opposite directions. So how many hours did it take Xiao Ming to go home from the start?
早上8点至9点之间的某一时刻，小明从家出发外出游玩，此时他发现手表上的时针和分针正好重合．下午2点至3点之间的某个时刻，小明回到了家，此时他发现手表上的时针和分针正好指向完全相反的方向．那么小明从出发，又回到家用了多少小时．
<result>6</result>