highway was jointly repaired by teams A and B in 12 days. Now team A repaired it for 6 days, and then team B repaired it for 1 day. A total of 25% of the road was repaired. If this road is repaired by team A alone, how many days will it take to complete?
一条公路，甲乙两队合修12天完成，现在甲队修了6天后，再由乙队修1天，共修了公路的25%，若这条公路由甲队单独修，需要多少天完成？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/4) - (1/12)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) / 5</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / (1/30)</gadget>
<output>30</output>

<result>30</result>