Two cars leave oppositely from places A and B at the same time. Car A travels 80 kilometers per hour, and car B travels 70 kilometers per hour. After 2 hours, the two cars have traveled 75% 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80千米，乙车每小时行70千米，经过2小时两车共行了全程的75%，甲、乙两地相距多少千米？
<gadget id="calculator">80 + 70</gadget>
<output>150</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / (3/4)</gadget>
<output>8/3 = around 2.666667</output>

<gadget id="calculator">150 * (8/3)</gadget>
<output>400</output>

<result>400</result>