Two cars, A and B, depart from two stations at the same time. Car A travels 60 kilometers per hour, and car B travels 70 kilometers per hour. After 3 hours, the two cars meet each other. How many kilometers are there between the stations A and B?
甲、乙两车同时从两车站相对开出，甲车每小时行60千米，乙车每小时行70千米，经过3小时两车相遇，甲、乙两车站相距多少千米？
<gadget id="calculator">60 + 70</gadget>
<output>130</output>

<gadget id="calculator">130 * 3</gadget>
<output>390</output>

<result>390</result>