A wall clock is 4 minutes behind every hour. According to this calculation, when the wall clock points to the standard time at 5 o'clock in the morning, when the wall clock points to 7 o'clock in the evening, what time is the standard time in the evening.
一个挂钟每小时慢4分钟，照这样计算，早上5时对准标准时间后，当晚上这个挂钟指着7时的时候，标准时间是晚上多少时．
<result>8</result>