To build a canal, teams A and B can complete the construction in 10 days. After the two teams work together for 2 days, the rest will be repaired by team A alone in 12 days. How many days will it take for team B to repair the canal alone?
修一条水渠，甲、乙两队合修10天可以完成，两队合修2天后，余下的由甲队单独修还要12天，那么乙队单独修这条水渠需要多少天？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 2</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 12</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/10) - (1/15)</gadget>
<output>1/30 = around 0.033333</output>

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

<result>30</result>