An engineering team renovates a 400-meter-long sewer, and (3/5) of the project is completed in the first 6 days. According to this calculation, how many days will it take for the remaining project to be completed?
一个工程队整修一段长400米的下水道，前6天完成工程的(3/5)，照这样计算，剩下的工程还需要几天才能完成？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 6</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">6 - (18/5)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">(12/5) / (3/5)</gadget>
<output>4</output>

<result>4</result>