From 8:00 a.m. to 12:00 a.m., Uncle Zhang processed 240 parts in total, how many parts are processed on average per hour.
从上午8时到12时，张叔叔共加工240个零件，平均每小时加工多少个零件．
<gadget id="calculator">240 / 4</gadget>
<output>60</output>

<result>60</result>