A car traveled a total of 210 kilometers from 8 am to 3 pm. What is the speed of this car?
一辆汽车从上午8时到下午3时，共行驶了210千米．这辆汽车的速度是多少？
<gadget id="calculator">210 / 7</gadget>
<output>30</output>

<result>30</result>