The master and the apprentice processed a batch of parts at the same time. When the task was completed, the apprentice processed 60 parts, which was 40% less than the master. How many parts did the master process?
师徒二人同时加工一批零件，完成任务时徒弟加工了60个零件，比师傅少40%．师傅加工了多少个零件？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">60 / (3/5)</gadget>
<output>100</output>

<result>100</result>