To build a rural cement road, team A alone will complete the construction in 20 days, and team B alone will complete the construction in 30 days. Teams A and B will complete the construction after a few days. How many days did the team work together?
修一条乡村水泥路，甲队单独修要20天完工，乙队单独修要30天完工，甲、乙两队合修了若干天后，乙队接着修，乙队修了5天才完工，甲、乙两队合修了多少天？
<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/30) * 5</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

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

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

<result>10</result>