project can be completed in 12 days through cooperation between A and B. Now A works for 4 days first, and B continues for 6 days, just completing the project (5/12). How many days will it take if B completes the project alone?
一项工程，甲乙合作12天可以完成．现在甲先做4天，乙接着做6天，正好完成了这项工程的(5/12)．若由乙单独完成这项工程，一共需要多少天？
<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

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

<gadget id="calculator">(1/12) * 4</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(5/12) - (1/3)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<gadget id="calculator">(1/12) / 2</gadget>
<output>1/24 = around 0.041667</output>

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

<result>24</result>