If a piece of work is done alone, A can complete it 2 days earlier than the specified time, and B can complete it 3 days earlier than the specified time. Now after A and B have cooperated for 2 days, B will continue to do the rest alone, and it will be completed within the specified time. If A and B work together, how many days will it take to complete all the work?
一件工作，如果单独做，甲比规定时间可提前2天才完成，乙则要超过规定时间3天才能完成．现在甲乙两人合作2天后，剩下的继续由乙单独做，刚好在规定时间完成．若甲乙两人合作，完成全部工作需要多少天？
<gadget id="calculator">12 - 2</gadget>
<output>10</output>

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

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

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

<gadget id="calculator">(1/10) + (1/15)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / (1/6)</gadget>
<output>6</output>

<result>6</result>