car travels a total of 490 kilometers from 9:00 am to 4:00 pm, how many kilometers per hour on average?
一辆汽车从上午9：00到下午4：00共行驶490千米，平均每小时行驶多少千米？
<gadget id="calculator">16 - 9</gadget>
<output>7</output>

<gadget id="calculator">490 / 7</gadget>
<output>70</output>

<result>70</result>