The space station is always observing the universe at any time. We recently discovered three stars, A, B, and C. Among them, B and C revolve around A, just like the earth revolves around Jupiter and the sun. If B takes 10 days to go around A, and C takes 12 days to go around A, and now A and B are on the same straight line, how many days later will they be on the same straight line next time?
空间站总在随时观测着宇宙．我们最近发现了甲、乙、丙三个星，其中乙和丙绕着甲转，就像地球绕和木星着太阳转那样．若乙绕甲转一圈用10天，丙绕甲转一圈用12天，现在甲乙在同一条直线上，则它们下次在同一条直线上是几天以后？
<gadget id="calculator">2 * 2 * 3 * 5</gadget>
<output>60</output>

<result>60</result>