The distance between A and B is 410 kilometers. A passenger car and a truck leave from A and B respectively. The truck travels 37 kilometers per hour. After the truck travels 82 kilometers, the bus departs from point B and meets again after 4 hours. How many kilometers does the bus travel per hour?
甲乙两地相距410千米，客车和货车分别从甲乙两地相向开出．货车每小时行37千米，当货车行了82千米以后，客车才从乙地开出，又经过4小时相遇，客车每小时行多少千米？
<gadget id="calculator">410 - 82</gadget>
<output>328</output>

<gadget id="calculator">328 / 4</gadget>
<output>82</output>

<gadget id="calculator">82 - 37</gadget>
<output>45</output>

<result>45</result>