Xiaohong and her father are running on a circular track. It takes Xiaohong 6 minutes to run a circle, and it takes 4 minutes for her father to run a circle. Xiaohong and her father start from the starting point at the same time. After how many minutes can they meet for the first time at the starting point?
小红和爸爸在圆形跑道上跑步，小红跑一圈要6分钟，爸爸跑一圈要4分钟．小红和爸爸同时从起点出发，他们多少分钟后可以在起点第一次相遇？
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<result>12</result>