Route 3 and Route 5 start at the same place. Route 3 departs every 6 minutes, and Route 5 departs every 8 minutes. After they depart at the same time, how many minutes will it take for the two routes to depart at the same time for the second time? ．
3路车和5路车起点在一处，3路车每隔6分钟发一次，5路车每隔8分钟发一次，他们同时发车后，至少多少分钟后两路车才能第二次同时发车．
<gadget id="calculator">2 * 2 * 2 * 3</gadget>
<output>24</output>

<result>24</result>