If one job is done alone, A can finish it 2 days ahead of the specified time, while B can finish it 3 days after the specified time. Now, after A and B have worked together for 2 days, B will continue to do the rest alone, and it will be completed within the stipulated date. If A and B work together, how many days will it take to complete the job?
一件工作，如果单独做，甲按规定时间可提前2天完成，乙则要超过规定时间3天才完成．现在，甲乙二人合做2天后，剩下的继续由乙单独做，刚好在规定的日期内完成．若甲乙二人合做，完成这件工作需要多少天．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</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>