Xiao Ming goes to the school library once every 4 days, and Xiao Hong goes to the school library to borrow books once every 6 days. If they both go to the library to borrow books at the same time on April 22, how many days later will they go to the school library to borrow books at the same time?
小明4天去一次学校图书馆，小红6天去一次学校图书馆借书，如果他们两人4月22日同时去图书馆借书，那么他们再过多少天又同时去借书？
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<result>12</result>