A project, two teams A and B work together to complete the project (2/3) in 4 days, and A alone completes it in 8 days. If B does it alone, how many days will it take to complete it?
一项工程，甲、乙两队合做4天完成这项工程的(2/3)，甲独做8天完成，如果乙独做，需要多少天完成？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(1/8) * 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/3) - (1/2)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) / 4</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">1 / (1/24)</gadget>
<output>24</output>

<result>24</result>