A and B can complete a road together in 6 days, and A can complete it in 10 days alone. If A and B practice together for 2 days first, and then B does alone, how many days will it take to complete?
甲、乙两人合修一条路6天可以完成，甲独修10天可完成．如果甲、乙先合修2天，然后由乙独修，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>1/15 = around 0.066667</output>

<gadget id="calculator">(2/3) / (1/15)</gadget>
<output>10</output>

<result>10</result>