There is a batch of clothing, Group A alone completed it in 10 days, Group B completed it alone in 12 days, and Group C completed it in 15 days alone. Now Group A, Group B, and Group C are working on it at the same time, and Group A in the middle has taken over other work and withdrawn Going out, it took 6 days to complete this batch of tasks. After Group A withdrew, how many days did Group B and Group C work together?
有一批服装，甲组单独做10天完成，乙组独做12天完成，丙组独做15天完成，现由甲、乙、丙三组同时做，中间甲组又接了其他活撤了出去，结果用了6天时间完成了这批任务，当甲组撤出后，乙、丙两组共同合作了多少天？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/10) + (1/12) + (1/15)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 6</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) - 1</gadget>
<output>1/2 = around 0.5</output>

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

<result>5</result>