A car has traveled a total of 630 kilometers from 9:00 am to 4:00 pm. How many kilometers per hour does the car travel on average?
一辆汽车从上午9时到下午4时一共行驶了630千米，这辆汽车平均每小时行驶多少千米？
<gadget id="calculator">16 - 9</gadget>
<output>7</output>

<gadget id="calculator">630 / 7</gadget>
<output>90</output>

<result>90</result>