The two masters and apprentices made a total of 870 parts in 5 days. How many parts do each person make per day on average?
师徒两人，5天共做了870个零件，平均每人每天做多少个零件？
<gadget id="calculator">870 / 2 / 5</gadget>
<output>87</output>

<result>87</result>