The master and apprentice process a batch of parts. The apprentice processes 129 parts every day. The master processes 2 times more than the apprentice every day. The master and apprentice work together to complete the task in 25 days. How many parts are there in total?
师徒二人加工一批零件，徒弟每天加工129个零件，师傅每天加工的比徒弟的2倍多2个，师徒二人合作25天完成任务，这批零件一共有多少个？
<gadget id="calculator">129 * 2</gadget>
<output>258</output>

<gadget id="calculator">258 + 2 + 129</gadget>
<output>389</output>

<gadget id="calculator">389 * 25</gadget>
<output>9_725</output>

<result>9_725</result>