Two cars leave oppositely from places A and B at the same time. Car A travels 50 kilometers per hour, and car B travels 60 kilometers per hour. After 4 hours, the two cars have traveled 80% of the whole journey. How many kilometers away are the places?
两辆汽车分别同时从甲、乙两地相对开出，甲车每小时行50千米，乙车每小时行60千米，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">50 + 60</gadget>
<output>110</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">110 * 5</gadget>
<output>550</output>

<result>550</result>