A total of 27 people in class 5 and 3 will participate in the checkers group activities. If 6 people form a group, at least how many students must be mobilized to participate in order to be grouped?
五3班共有27人要参加跳棋组活动，按6人组成一个小组，至少还要动员几名同学参加才能正好分组？
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">30 - 27</gadget>
<output>3</output>

<result>3</result>