The distance between A and B is 360 kilometers. A car departs from A to B. After 2.5 hours, more than 20 kilometers from the midpoint. How many hours does the car journey take?
甲、乙两地相距360千米，一辆汽车从甲地出发去乙地．经过2.5小时超过中点20千米．汽车行完全程要多少小时？
<gadget id="calculator">360 / 2</gadget>
<output>180</output>

<gadget id="calculator">180 + 20</gadget>
<output>200</output>

<gadget id="calculator">200 / 2.5</gadget>
<output>80</output>

<gadget id="calculator">360 / 80</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>