Uncle Li made a total of 720 dolls from 7:00 am to 11:00 am. How many dolls does he make on average per hour?
李叔叔从上午7时到11时，一共做了720个玩具娃娃，平均每小时做多少个玩具娃娃？
<gadget id="calculator">11 - 7</gadget>
<output>4</output>

<gadget id="calculator">720 / 4</gadget>
<output>180</output>

<result>180</result>