Both Zhang Lin and Li Qiang love to read in the library. Zhang Lin goes there every 4 days, and Li Qiang goes there every 6 days. Once they met in the library. How many more days will they meet again in the library?
张林、李强都爱在图书馆看书，张林每4天去一次，李强每6天去一次，有一次他们两人在图书馆相遇，至少再过多少天他们又可以在图书馆相遇？
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<result>12</result>