To build a road, teams A and B will complete the repair in 20 days, team B will complete the repair in 30 days alone, and after 8 days, the rest will be repaired by team B alone. How many days will it take to complete?
修一条公路，甲、乙两队合修20天完成，乙队独修30天完成，两队合修8天后，剩下的由乙队独修，还要几天才能完成？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) * 8</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(3/5) / (1/30)</gadget>
<output>18</output>

<result>18</result>