Xiao Ming's house is very close to the train station, and he can get up every day according to the bell of the station building. The bell of the station building, every time it is rung, delays for 3 seconds, and then strikes the second time after an interval of 1 second. If Xiao Ming wakes up from the first ringing of the bell, then Xiao Ming can clearly judge that it is 6 o'clock in the morning, and how many seconds have passed before and after.
小明家离火车站很近，他每天都能根据车站大楼的钟声起床．车站大楼的钟，每敲响一下延时3秒，间隔1秒后再敲第二下．假如从第一下钟声响起，小明就醒了，那么到小明确切判断出已是清晨6时，前后共经过了多少秒钟．
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<result>24</result>