Two masters and apprentices process a batch of parts. It is known that the master has processed 50 parts, and the master has completed (5/8) of the total. How many parts should the apprentice process?
师徒二人加工一批零件，已知师傅加工了50个，师傅完成了总数的(5/8)，求徒弟加工了多少个？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">50 / (5/8)</gadget>
<output>80</output>

<gadget id="calculator">80 - 50</gadget>
<output>30</output>

<result>30</result>