Cars A and B are traveling towards each other from cities A and B at the same time, and they can meet each other in 6 hours. Now, car A will be 210 kilometers away from city B in 1 hour after starting from city A, and car B will be 210 kilometers away from city B in 1 hour after starting from city B. The city is 230 kilometers, how many kilometers is the distance between A and B?
甲、乙两车同时从A、B两城相向而行，6小时可以相遇，现在甲车从A城出发行1小时后距B城210千米，乙车从B城出发1小时后距A城230千米，A、B两城相距多少千米？
<gadget id="calculator">210 + 230</gadget>
<output>440</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2 - (1/6)</gadget>
<output>11/6 = around 1.833333</output>

<gadget id="calculator">440 / (11/6)</gadget>
<output>240</output>

<result>240</result>