A project can be completed by team A alone in 12 days. After team A works in 3 days and team B works in 2 days, it is just half completed. Now after team A and team B cooperate for several days, team B can complete it alone. equal. How many days will it take?
一件工程，甲队独做12天可以完成，甲队做3天后乙队做2天恰好完成一半，现在甲、乙两队合作若干天后，由乙队单独完成，做完后发现两段时间相等．则共用几天？
<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>