A car travels 300 kilometers from place A to place B in 4 hours. At this time, it is still 225 kilometers away from place B. According to this calculation, how much time will it take to complete the remaining distance? (Two ways to solve the problem, one of which is to use proportional solution)
一辆汽车从甲地到乙地4小时行了300千米，这时距离乙地还有225千米，照这样计算，行完剩下的路程还需要多少时间？(用两种方法解决问题，其中一种要用比例解)
<gadget id="calculator">300 / 4</gadget>
<output>75</output>

<gadget id="calculator">225 / 75</gadget>
<output>3</output>

<result>3</result>