The fifth grade students participate in the group broadcasting exercise competition. Every 18 people stand in a row or every 24 people stand in a row. They all stand in a whole row. How many people in the fifth grade at least participate in the competition?
五年级同学参加团体广播操比赛，每18人站一行或每24人站一行，都正好站成整行，五年级至少有多少人参加比赛？
<gadget id="calculator">2 * 2 * 2 * 3 * 3</gadget>
<output>72</output>

<result>72</result>