Uncle Zhang and Uncle Li have to install 84 air conditioners in total, and they can complete the task in 6 days. How many air conditioners are installed per person per day on average?
张叔叔和李叔叔一共要安装84台空调，他们6天可以完成任务．平均每人每天安装多少台空调？
<gadget id="calculator">84 / 6 / 2</gadget>
<output>7</output>

<result>7</result>