Two cars depart from stations A and B at the same time, drive toward each other, and meet each other in 6 hours. Car A travels 40 kilometers per hour, and car B travels slower (1/4) than car A. How many kilometers is the road between stations A and B?
两辆汽车同时从A、B两站出发，相向而行，6小时相遇．甲车每小时行40千米，乙车的速度比甲车慢(1/4)，A、B两站间的公路长多少千米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">40 * (3/4)</gadget>
<output>30</output>

<gadget id="calculator">40 + 30</gadget>
<output>70</output>

<gadget id="calculator">70 * 6</gadget>
<output>420</output>

<result>420</result>