The master and apprentice worked together to process 960 parts. After they worked for 4 days, there were still 240 parts left unprocessed. The apprentice processes 83 per day, how many per day does the master process?
师徒二人共同加工零件960个，他们工作4天后，还剩下240个没有加工．徒弟每天加工83个，师傅每天加工多少个？
<gadget id="calculator">83 * 4</gadget>
<output>332</output>

<gadget id="calculator">960 - 240 - 332</gadget>
<output>388</output>

<gadget id="calculator">388 / 4</gadget>
<output>97</output>

<result>97</result>