Two trains depart from A and B at the same time at the same time. The speed of train A is 120 km/h, and the speed of train B is 110 km/h. After 6 hours, the distance between them is still 30 km. How many kilometers is the distance between A and B?
两列火车分别从甲乙两地同时相对开出甲车速度是120千米/时，乙车速度是110千米/时，6小时后还相距30千米．甲乙两地间的路程时多少千米？
<gadget id="calculator">120 * 6</gadget>
<output>720</output>

<gadget id="calculator">110 * 6</gadget>
<output>660</output>

<gadget id="calculator">720 + 660 + 30</gadget>
<output>1_410</output>

<result>1_410</result>