Xiaoxiao's alarm clock is 3 minutes faster all day and night. He wants the clock to ring on time at 8:00 Beijing time tomorrow morning, so how many minutes should he set the alarm clock back at 4:00 Beijing time today?
笑笑的闹钟一昼夜快3分钟．他想让这个钟在明天早上北京时间8点准时闹响，那么他在北京时间今天下午4点的时候，就应该把闹钟往慢拨多少分钟？
<gadget id="calculator">24 / 3</gadget>
<output>8</output>

<gadget id="calculator">16 / 8</gadget>
<output>2</output>

<result>2</result>