From 8:00 am to 2:00 pm, Master Li processed 420 parts, how many parts are processed per hour on average.
从上午8时到下午2时，李师傅加工了420个零件，平均每小时加工多少个零件．
<gadget id="calculator">14 - 8</gadget>
<output>6</output>

<gadget id="calculator">420 / 6</gadget>
<output>70</output>

<result>70</result>