Two cars leave opposite each other from cities A and B at the same time. It is known that the express train travels 60 kilometers per hour. Both cars stop twice on the way, each time for 0.25 hours. After 6 hours, the two cars are at the midpoint of the distance. They meet at a distance of 27.5 kilometers, please calculate how many kilometers are the distance between A and B?
两辆汽车同时从甲、乙两城相对开出，已知快车每时行60千米，两辆汽车都在途中停车2次，每次均停0.25小时，6小时后两车在距离中点27.5千米处相遇，请你算一算甲、乙两城相距多少千米？
<gadget id="calculator">0.25 * 2</gadget>
<output>0.5</output>

<gadget id="calculator">6 - 0.5</gadget>
<output>5.5</output>

<gadget id="calculator">60 * 5.5</gadget>
<output>330</output>

<gadget id="calculator">27.5 * 2</gadget>
<output>55</output>

<gadget id="calculator">330 - 55</gadget>
<output>275</output>

<gadget id="calculator">330 + 275</gadget>
<output>605</output>

<result>605</result>