It is 480 kilometers from point A to point B. A car traveled the entire distance (7/20) in the first 3.5 hours. At this speed, how many hours will it take to complete the journey? (proportional solution)
A地到B地480千米，一辆汽车前3.5小时行了全程的(7/20)，按这样的速度，行完全程需要多少小时？(比例解)
<gadget id="calculator">7 / 20</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">3.5 / (7/20)</gadget>
<output>10</output>

<result>10</result>