To make a batch of parts, the master can make 112 parts every day, and the apprentice makes 10 fewer parts than the master every day. The apprentice first processes 210 parts and then two people work together for 3 days to complete the task. How many parts are there in this batch?
要做一批零件，师傅每天能做112个，徒弟每天比师傅少做10个，徒弟先加工210个两人再一起加工3天才完成任务，这批零件共有多少个？
<gadget id="calculator">112 - 10</gadget>
<output>102</output>

<gadget id="calculator">102 + 112</gadget>
<output>214</output>

<gadget id="calculator">214 * 3</gadget>
<output>642</output>

<gadget id="calculator">642 + 210</gadget>
<output>852</output>

<result>852</result>