It takes Xiaoming 6 minutes to run around the playground, and mother runs 4 minutes. If Xiao Ming and his mother start running at the same time, at least how many minutes later they meet again at the starting point?
小明跑操场一圈要6分钟，妈妈跑一圈4分钟．如果小明和妈妈同时起跑，至少多少分钟后两人在起点再次相遇？
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<result>12</result>