Aunt Li has 800 yuan. After buying 25 boxes of eggplants, there is 50 yuan left. How much is the average price of each box of eggplants?
李阿姨有800元，买了25箱茄子后还剩50元，平均每箱茄子多少元？
<gadget id="calculator">800 - 50</gadget>
<output>750</output>

<gadget id="calculator">750 / 25</gadget>
<output>30</output>

<result>30</result>