Two road repair teams work together to build a 3.9-kilometer road and complete it in 20 days. Road repair team A repairs 0.1 km per day, and how many kilometers does road repair team B repair every day?
两个修路队合修一条3.9千米的路，20天完成，甲修路队每天修0.1千米，乙修路队每天修多少千米？
<gadget id="calculator">20 * 0.1</gadget>
<output>2</output>

<gadget id="calculator">3.9 - 2</gadget>
<output>1.9</output>

<gadget id="calculator">1.9 / 20</gadget>
<output>0.095</output>

<result>0.095</result>