passenger car and a truck travel towards each other from places A and B at the same time, the bus travels 50.6 kilometers per hour, the truck travels 48.8 kilometers per hour, and they meet each other in 4.5 hours. How many kilometers are there between A and B?
客车和货车同时从甲、乙两地相向而行，客车每小时行50.6千米，货车每小时行48.8千米，4.5小时相遇．甲、乙两地相距多少千米？
<gadget id="calculator">50.6 + 48.8</gadget>
<output>99.4</output>

<gadget id="calculator">99.4 * 4.5</gadget>
<output>447.3</output>

<result>447.3</result>