Uncle Zhang and three other colleagues installed a total of 60 air conditioners in 5 days. How many air conditioners are installed per person per day on average?
张叔叔和另外3个同事5天一共安装了60台空调，平均每人每天安装多少台空调？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">60 / 4 / 5</gadget>
<output>3</output>

<result>3</result>