The master and the apprentice process the same number of parts. When the master processes 75 parts, the apprentice only processes 50 parts. At this time, the number of parts left by the apprentice is 5 more than the number of parts left by the master. How many parts did the apprentice want to process?
师傅和徒弟加工同样多的零件，当师傅加工了75个，徒弟才加工了50个．这时，徒弟剩下的个数比师傅剩下的个数的3倍还多5个，问徒弟原来要加工多少个零件？
<gadget id="calculator">75 - 50 - 5</gadget>
<output>20</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 75</gadget>
<output>85</output>

<result>85</result>