Team A and Team B jointly pave a 200-kilometer road and complete it in 25 days. It is known that team A paves 4.2 kilometers per day, how many kilometers per day does team B pave?
甲乙两队同铺一条长200千米的公路，25天完成．已知甲队每天铺4.2千米，乙队每天铺多少千米？
<gadget id="calculator">200 / 25</gadget>
<output>8</output>

<gadget id="calculator">8 - 4.2</gadget>
<output>3.8</output>

<result>3.8</result>