A project can be completed by team A in 10 days and team B in 15 days. After team A has been working alone for 2 days, team B will complete the rest alone. How many days does team B need to complete the task?
一项工程，甲队独做10天完成，乙队独做15天完成．甲队独做2天后剩下的由乙队单独完成，乙队需要几天完成任务？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 2</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) / (1/15)</gadget>
<output>12</output>

<result>12</result>