Team A and Team B build a road. Team A will complete the repair in 20 days alone, and Team B will complete the repair in 30 days alone. If Team A and Team B repair it together after 10 days and let Team B repair it alone, it will take a few days to complete the repair this road?
甲、乙两队修一条路，甲队单独修20天修完，乙队单独修30天修完，如果甲、乙两队合修10天后让乙队单独修，还需几天才能修完这条路？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

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

<gadget id="calculator">(1/20) + (1/30)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 10</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) / (1/30)</gadget>
<output>5</output>

<result>5</result>