Master Wang sold a total of 217 boxes of apples in the first three days of this week, and a total of 371 boxes of apples in the last four days. May I ask how many boxes of apples Mr. Wang sells on average every day this week?
王师傅在这个星期的前三天共销售了217箱苹果，后四天共销售了371箱苹果．请问王师傅这个星期平均每天销售多少箱苹果？
<gadget id="calculator">217 + 371</gadget>
<output>588</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">588 / 7</gadget>
<output>84</output>

<result>84</result>