Cars A and B are traveling towards each other at a distance of 270 km, and the two cars meet each other in 2 hours. The speed of car A is twice that of car B, how many kilometers does car A travel per hour?
甲乙两车相距270km的两地同时相向而行，2小时两车相遇．甲车的速度是乙车的2倍，甲车每小时行多少km？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">270 / 2 / 3</gadget>
<output>45</output>

<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<result>90</result>