A car travels 300 kilometers in 5 hours. According to this calculation, starting from 8:30 in the morning and driving until 15:30 in the afternoon, how many kilometers have you traveled during this period?
一辆汽车5小时行300千米，照这样计算，从早上8：30出发，一直行驶到下午15：30，这段时间内行驶了多少千米？
<gadget id="calculator">300 / 5</gadget>
<output>60</output>

<gadget id="calculator">15.5 - 8.5</gadget>
<output>7</output>

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

<result>420</result>