A project alone takes 8 days to complete, and B alone takes 12 days to complete. After A and B worked together for a few days, A was transferred out, and B continued to work. It took 6 days to complete the task, how many days was A transferred out?
一项工程，甲独做要8天完成，乙独做要12天完成．甲、乙合做了几天后甲被调出，乙继续做，完成任务时一共用了6天，则甲被调出几天？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) / (1/8)</gadget>
<output>4</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<result>2</result>