Two trains depart from AB at the same time and meet each other in 3 hours. Train A travels 110 kilometers per hour and train B travels 100 kilometers per hour. What is the distance in kilometers between AB and AB? (Draw a line segment diagram to analyze the meaning of the question and answer it)
两列火车同时从AB两地相对开出，3小时相遇，甲车每小时行110千米，乙车每小时行100千米，AB两地间的距离是多少千米？(画线段图分析题意并解答)
<gadget id="calculator">110 * 3</gadget>
<output>330</output>

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

<gadget id="calculator">330 + 300</gadget>
<output>630</output>

<result>630</result>