Two cars depart from two places at the same time, the speed of one car is 55 km/h, the speed of the other car is 75 km/h, they meet 4.8 hours after departure, the highway between the two places How many kilometers long?
两辆汽车同时从两地相对开出，一辆车的速度是55千米/每小时，另一辆车的速度是75千米/每小时，出发后4.8小时相遇，两地之间的公路长多少千米？
<gadget id="calculator">55 + 75</gadget>
<output>130</output>

<gadget id="calculator">130 * 4.8</gadget>
<output>624</output>

<result>624</result>