It takes 18 days to build a canal by Team A alone. Now Team A and Team B have completed 3 days of joint work to repair (1/4) of the canal. Team B will repair the rest alone. How many days will it take to complete the repair? ?
修一条水渠，由甲队单独修要18天完成，现在甲、乙两队合修3天正好修了这水渠的(1/4)，余下的由乙队独修，还要多少天才能修完？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(1/4) / 3</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 18</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">(1/12) - (1/18)</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">(3/4) / (1/36)</gadget>
<output>27</output>

<result>27</result>