The master processes 38 parts every day, and the apprentice processes 22 parts every day. The master and apprentice complete a batch of processing tasks together. After 15 days of doing it, there are still 40 parts that have not been processed. How many parts are there in this batch?
师傅每天加工零件38个，徒弟每天加工零件22个，师徒一起完成一批加工任务，做了15天后，还有40个没加工．这批零件共有多少个？
<gadget id="calculator">38 + 22</gadget>
<output>60</output>

<gadget id="calculator">60 * 15</gadget>
<output>900</output>

<gadget id="calculator">900 + 40</gadget>
<output>940</output>

<result>940</result>