For a project, Team A can complete the task alone in 12 days. If team A works for 3 days and then team B takes over for 2 days, then exactly half of the project is completed. Now this project is firstly done by teams A and B for a certain number of days, and the rest is completed by team B alone. It is known that the time for the two teams to work together is equal to the time for team B to do it alone. How many days will it take to complete the task?
一项工程，甲队独做12天可以完成任务．如果甲队做3天后乙队接替做2天，则恰好完成工程的一半．现在这件工程先由甲、乙两队合做若干天后，剩下的由乙队单独完成，已知两队合做时间与乙队单独做时间相等．完成任务共有多少天？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/12) + (1/8) + (1/8)</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>