The distance between A and B is 360 kilometers. A car starts from A and goes to B. After 2 hours, it will be 216 kilometers away from B. According to this calculation, how many hours will it take to reach B?
甲、乙地相距360千米，一辆汽车从甲地出发开往乙地，2小时后离乙地还有216千米．照这样计算，到达乙地还需多少小时．
<gadget id="calculator">360 - 216</gadget>
<output>144</output>

<gadget id="calculator">144 / 2</gadget>
<output>72</output>

<gadget id="calculator">216 / 72</gadget>
<output>3</output>

<result>3</result>