Two cars leave from A and B at the same time. A travels 48 kilometers per hour, and B travels 54 kilometers per hour. After 4 hours, the two cars have traveled 80% of the whole journey. How many kilometers are there between A and B?
两车同时从甲乙两地相对开出，甲每小时行48千米，乙车每小时行54千米，经过4小时两车共行了全程的80%．甲乙两地相距多少千米？
<gadget id="calculator">48 + 54</gadget>
<output>102</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">4 / (4/5)</gadget>
<output>5</output>

<gadget id="calculator">102 * 5</gadget>
<output>510</output>

<result>510</result>