A project can be completed by team A alone in 10 days, team B alone in 12 days, and team C in 15 days alone. It took 6 days to complete the task, how many days did Team A do it?
一项工程，甲队单独做要10天完成，乙队单独做12天完成，丙队单独做15天完成，现在甲乙丙合作一段时间后，甲队被抽去做别的事，共花了6天时间完成任务，甲队做了多少天？
<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">(1/12) + (1/15)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(3/20) * 6</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<result>1</result>