There are two road repair teams, A and B. Team A can complete the work in 5 days alone (1/5), and team A and B can complete the work in 3 days (1/5). How many days does it take for B to repair alone? ?
甲、乙两个修路队，甲队单独修5天完成这件工作的(1/5)，甲、乙合修3天完成这件工作的(1/5)，乙单独修需要多少天？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 3</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/5) / 5</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(1/15) - (1/25)</gadget>
<output>2/75 = around 0.026667</output>

<gadget id="calculator">1 / (2/75)</gadget>
<output>75/2 = around 37.5</output>

<result>75/2 = around 37.5</result>