A truck and a car start from two cities, A and B, at the same time and head toward each other. The truck travels 50 kilometers per hour, the car travels 30 kilometers per hour faster than the truck, and the two cars meet on the way after 5 hours. How many miles are the two cities A and B?
一辆卡车和一辆轿车同时从甲乙两座城市出发，相向而行．卡车每小时行50千米，轿车每小时比卡车快30千米，两车5小时后在途中相遇．甲乙两座城市相距多少千米？
<gadget id="calculator">50 + 50 + 30</gadget>
<output>130</output>

<gadget id="calculator">130 * 5</gadget>
<output>650</output>

<result>650</result>