The fifth grade students line up to do exercises. If there are 3 people in a group, there will be one person left at the end; if there are 7 people in a group, there will be 5 people left at the end; if there are 11 people in a group, there will be 9 people left at the end.
五年级同学排队做操，如果3人一行，最后余1人，如果7人一行最后余5人，如果11人一行最后余9人，五年级最少有多少人？
<gadget id="calculator">3 * 7 * 11</gadget>
<output>231</output>

<gadget id="calculator">231 - 2</gadget>
<output>229</output>

<result>229</result>