The distance between the two places is 480 kilometers. Two cars drive oppositely from two places at the same time, the speed of car A is 1.5 times that of car B, and the distance between them is still 80 meters after 4 hours. What is the speed of car B?
两地相距480千米．两辆汽车同时从两地相对开出，甲车的速度是乙车的1.5倍，4小时后还相距80米．乙车速度是多少？
<gadget id="calculator">480 - 80</gadget>
<output>400</output>

<gadget id="calculator">1 + 1.5</gadget>
<output>2.5</output>

<gadget id="calculator">400 / 4 / 2.5</gadget>
<output>40</output>

<result>40</result>