A car travels 135 kilometers in 3 hours. According to this calculation, how many hours will it take to travel 405 kilometers?
一辆汽车3小时行驶135千米，照这样计算，要行驶405千米，需要多少小时？
<gadget id="calculator">135 / 3</gadget>
<output>45</output>

<gadget id="calculator">405 / 45</gadget>
<output>9</output>

<result>9</result>