When the fifth grade class organizes the general cleaning, if the groups of 5 or 6 are just divided into groups, and there is nothing left. At least how many people are there in this class.
五年级一班组织大扫除时，若5人一组或6人一组都恰好分完，且没有剩余．这个班至少有多少人．
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<result>30</result>