The students made plant specimens, Li Li made 32 pieces, Wang Qiang made 38 pieces, Zhao Ning and Chen Ting made 50 pieces in total, how many pieces did each person make on average?
同学们制作植物标本，李立制作32件，王强制作38件，赵宁和陈婷共制作50件，平均每人制作多少件？
<gadget id="calculator">32 + 38 + 50</gadget>
<output>120</output>

<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<result>30</result>