It is 180 kilometers from Xi'an to Baoji. Two cars, A and B, drive from opposite places at the same time. They meet each other after 2 hours. Car A travels 38 kilometers per hour. How many kilometers does car B travel per hour?
西安到宝鸡180千米，甲、乙两辆汽车同时从两地相对开出，2小时后相遇，甲车每小时行38千米，乙车每小时行多少千米？
<gadget id="calculator">180 / 2</gadget>
<output>90</output>

<gadget id="calculator">90 - 38</gadget>
<output>52</output>

<result>52</result>