To build a road with a length of 1800m, the worker uncle repaired it in 8 days (2/5). At this speed, how many days will it take for them to finish the rest of the road?
修一条长1800m的路，工人叔叔8天修了(2/5)．以这样的速度，他们修完剩下的路还要多少天？
<gadget id="calculator">2 / 5</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">(2/5) / 8</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(3/5) / (1/20)</gadget>
<output>12</output>

<result>12</result>