A batch of parts can be completed by the master alone in 10 hours, and by the apprentice in 15 hours. The master-student cooperates. When the task is completed, the apprentice makes 48 fewer parts than the master. How many parts are there in this batch?
一批零件，师傅单做10小时可以完成，徒弟单做15小时可以完成，师徒合作，完成任务时，徒弟比师傅少做48个，这批零件共有多少个？
<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">48 / 1</gadget>
<output>48</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">48 * 5</gadget>
<output>240</output>

<result>240</result>