Children play games, if there are 3 people, 5 people or 6 people, the whole class happens to be empty, how many people are there at least in this version?
小朋友们做游戏，如果3个人一组或5个人一组或6个人一组，全班恰好无余，这个版至少有多少人？
<gadget id="calculator">2 * 3 * 5</gadget>
<output>30</output>

<result>30</result>