A project can be completed by team A alone in 6 days, and by team B in 8 days. Team A will work on it in 3 days first, and then team B will do it. How many days will it take to complete?
一项工程，甲队单独做要6天完成，乙队单独做要8天完成，甲队先做3天，然后由乙队去做，还要几天才能完成？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) * 3</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/2) / (1/8)</gadget>
<output>4</output>

<result>4</result>