A project can be completed in 6 days by team A alone, and 10 days by team B alone. After team A works in 2 days first, how many days will it take to complete the rest?
一项工程，甲队独做6天完成，乙队独做10天完成，甲队先做2天后，剩下的甲乙合做还需要多少天完成？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) * 2</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(1/6) + (1/10)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(2/3) / (4/15)</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>