Two cars, A and B, start from A and B at the same time and leave opposite each other. When A arrives at B, it returns on the same road, and after B arrives at A, it returns on the same road. When they meet on the way back, A travels a total of 140 kilometers. , Car B travels a total of 160 km. So how far is the distance between A and B?
甲、乙两车分别从A、B两地同时出发相对开出，甲车到B地后原路返回，乙车到A地后原路返回，在返回途中相遇时甲车共行驶140千米，乙车共行驶160千米．那么A、B两地相距多少千米．
<gadget id="calculator">140 + 160</gadget>
<output>300</output>

<gadget id="calculator">300 / 3</gadget>
<output>100</output>

<result>100</result>