The new library has opened. Xiaohong goes to the library every 3 days, and Xiaoling goes to the library every 4 days. After Xiaohong and Xiaoling meet in the library one day, how many days will it take for them to meet again? Libraries meet again?
新图书馆开馆了，小红每隔3天去图书馆一次，小灵每隔4天去一次，请问小红和小灵某天在图书馆相遇后，请问经过几天她们有可能会在图书馆再次相遇？
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>