Three classmates discussed going to the library to borrow books during the summer vacation. Xiao Ming said: "I will go every 4 days", Xiao Hua said: "I will go every 6 days", Xiao Hong said: "My home is far away, every 10 days I can only go once, but I can borrow a few more books each time." If three people go to the library to borrow books at the same time on July 5, then at least in a few days, two of them will meet in the library?
三个同班同学商议暑期去图书馆借书，小明说："我每4天就去一次"，小华说："我每6天去一次"，小红说："我家路远，每10天才能去一次，但我每一次可多借几本．"如果3人7月5日同时去图书馆借书，那么至少再过几天，他们三人中有两人会在图书馆相遇？
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<result>12</result>