A car needs to travel 480 kilometers from point A to point B, and it will travel 180 kilometers in the first 3 hours. According to this calculation, how many hours will it take to complete the journey? (Solution by proportional method)
一辆汽车从甲地到乙地要行480千米，前3小时行180千米，照这样计算，行完全程需要多少小时？(用比例方法解)
<gadget id="calculator">180 / 3</gadget>
<output>60</output>

<gadget id="calculator">480 / 60</gadget>
<output>8</output>

<result>8</result>