A car travels 45 kilometers per hour from city A to city B. The train departs from City A at 8:00 am and arrives at City B at 12:00 am. How many kilometers is the distance between City A and City B?
一辆汽车从甲城开往乙城，每小时行45千米．早上8时从甲城发车，12时到达乙城，甲城到乙城相距多少千米？
<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<gadget id="calculator">45 * 4</gadget>
<output>180</output>

<result>180</result>