The master and the apprentice want to produce a batch of parts together. The master has already produced (3/5) of this batch of parts, and the apprentice has already produced (1/3) of this batch of parts. The master has produced 80 more parts than the apprentice. How many parts does a person have to produce to complete the task?
师徒二人要共同生产一批零件，师傅已经生产了这批零件的(3/5)，徒弟已经生产了这批零件的(1/3)，师傅比徒弟多生产80个，师徒二人还要生产多少个零件才能完成任务？
<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">80 / (4/15)</gadget>
<output>300</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">300 * (2/15)</gadget>
<output>40</output>

<result>40</result>