A project is done alone, A needs 10 days to complete, and B needs 6 days to complete. Now, A will do it alone for 2 days. How many days will it take for the rest to be completed by the cooperation of A and B?
一项工程独做，甲要10天完成，乙要6天完成，现在先由甲独做2天，余下的由甲、乙两队合做还要几天才能完成？
<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 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

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

<result>3</result>