If A and B work together to complete a project in 8 days, A alone will take 12 days to complete it, and how many days will it take B alone to complete it?
一项工程，甲乙合做8天完成，甲独做需要12天完成，乙独做需要多少天完成．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/8) - (1/12)</gadget>
<output>1/24 = around 0.041667</output>

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

<result>24</result>