The No. 2 bus departs every 4 minutes, and the No. 3 bus departs every 6 minutes. If the bus departs at the same time now, at least how many minutes later it will depart at the same time.
2路公共汽车每4分钟发一次车，3路公共汽车每6分钟发一次车，如果现在同时发车，至少隔多少分钟再同时发车．
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<result>12</result>