Mr. Wang has corrected 68 essays, 38 of which have already been corrected. The rest Mr. Wang will finish correcting in 5 days. How many essays does Mr. Wang correct every day on average?
王老师批改68篇作文，已经批改了38篇，剩下的王老师5天要把他批改完，王老师平均每天要批改多少篇？
<gadget id="calculator">68 - 38</gadget>
<output>30</output>

<gadget id="calculator">30 / 5</gadget>
<output>6</output>

<result>6</result>