long-distance bus travels 63 kilometers per hour, and it takes 15 hours to travel from city A to city B. How many kilometers are there between the two cities?
长途客车每小时行63千米，从甲城到乙城用了15小时．甲乙两城相距多少千米？
<gadget id="calculator">63 * 15</gadget>
<output>945</output>

<result>945</result>