A car departs from City A at 15:30 and arrives at City B at 19:30. The distance between the two cities is 450 kilometers. How many kilometers does the car travel on average per hour?
一辆汽车15：30从甲城出发，19：30到达乙城，两城相距450千米，汽车平均每小时行多少千米？
<gadget id="calculator">450 / 4</gadget>
<output>225/2 = around 112.5</output>

<result>225/2 = around 112.5</result>