A batch of parts is distributed to 3, 5, and 7 masters on average, and there is only one left. The number of parts in this batch is between 200 and 300. May I ask how many parts are in this batch?
一批零件平均分给3个、5个、7个师傅做都剩1个，这批零件在200～300个之间．请问这批零件有多少个？
<gadget id="calculator">210 + 1</gadget>
<output>211</output>

<result>211</result>