Team A and Team B dig a canal. Team A alone completes the work in 8 days, and Team B alone completes the work in 12 days. Now after the two teams dug together for a few days, team B was transferred away, and the remaining team A finished digging within 3 days. How many days did Team B dig?
甲、乙两队挖一条水渠，甲队单独挖8天完成，乙队单独挖12天完成．现在两队合挖了几天后，乙队调走，余下的甲队3天内挖完．乙队挖了多少天？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) * 3</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

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

<gadget id="calculator">(1/8) + (1/12)</gadget>
<output>5/24 = around 0.208333</output>

<gadget id="calculator">(5/8) / (5/24)</gadget>
<output>3</output>

<result>3</result>