Mingming and his parents planted a total of 84 trees on Monday, how many trees per person per day on average?
明明和爸爸妈妈一星期一共栽了84棵树，平均每人每天栽多少棵树？
<gadget id="calculator">84 / 3 / 7</gadget>
<output>4</output>

<result>4</result>