A car travels 420 kilometers from 8 am to 3 pm. What is the speed of the car?
一辆汽车从上午8时到下午3时共行驶420千米，这辆汽车的速度是多少？
<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">420 / 7</gadget>
<output>60</output>

<result>60</result>