Two road construction teams, A and B, work together to repair a section of road. The work efficiency of team A is (3/5) that of team B. The two teams just finished repairing (2/3) of this section of road in 4 days, and the rest is left by A. How many days will it take for the team to complete it alone?
甲、乙两个修路队合修一段公路，甲队的工作效率是乙队的(3/5)，两队合作4天正好修完这段公路的(2/3)，余下的由甲队单独修，还要几天才能修完？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 + (3/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">(2/3) / 4 / (8/5)</gadget>
<output>5/48 = around 0.104167</output>

<gadget id="calculator">(5/48) * (3/5)</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">(1/3) / (1/16)</gadget>
<output>16/3 = around 5.333333</output>

<result>16/3 = around 5.333333</result>