A car travels 120 kilometers in 1.5 hours. According to this calculation, how many hours will it take to travel another 240 kilometers? (Solve with ratio)
一辆汽车1.5小时行驶120千米，照这样计算，再行驶240千米，还需要多少小时？(用比例解)
<gadget id="calculator">120 / 1.5</gadget>
<output>80</output>

<gadget id="calculator">240 / 80</gadget>
<output>3</output>

<result>3</result>