It is 180KM from Chaling County to Changsha, which takes 3.6 hours for a bus and 2.5 hours for a car. How much faster is the car than the passenger car?
从茶陵县城到长沙有180KM，一辆客车3.6小时行完全程，一辆小汽车2.5小时行完全程．小汽车的速度比客车的速度快多少？
<gadget id="calculator">180 / 2.5</gadget>
<output>72</output>

<gadget id="calculator">180 / 3.6</gadget>
<output>50</output>

<gadget id="calculator">72 - 50</gadget>
<output>22</output>

<result>22</result>