Dad and Mom are running and exercising on the playground. Dad: 4 minutes for each lap; Mom: 6 minutes for each lap. Mom and Dad start from the starting point at the same time, and they meet at the starting point after at least a few minutes?
爸爸、妈妈在操场上跑步锻炼，爸爸：每一圈用4分钟；妈妈：每一圈用6分钟．爸爸、妈妈同时从起点出发，他们至少经过几分钟后在起点相遇？
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<result>12</result>