The master and apprentice produced a batch of parts. In the morning, they produced 82 parts in total. In the afternoon, the work efficiency of the master increased by 30% compared with that in the morning. The apprentice produced 10 more parts than in the morning, and they produced 107 parts in the afternoon. How many parts does the master produce in the morning?
师徒两人生产一批零件，上午两人共生产82个，下午师傅的工作效率比上午提高了30%，徒弟比上午多生产了10个，两人下午共生产107个零件．师傅上午生产零件多少个？
<gadget id="calculator">107 - 82 - 10</gadget>
<output>15</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">15 / (3/10)</gadget>
<output>50</output>

<result>50</result>