Car A travels 80 kilometers per hour, and car B travels 70 kilometers per hour. The two cars leave opposite places at the same time and meet each other after 40 minutes. How many kilometers are the distance between the two places?
甲车每小时行80千米，乙车每小时行70千米，两车同时从两地相对开出，行40分钟相遇．两地相距多少千米？
<gadget id="calculator">80 + 70</gadget>
<output>150</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">150 * (2/3)</gadget>
<output>100</output>

<result>100</result>