It takes 16 days for Team A to complete a project alone. Now after Team A has done it for 4 days, Team B joins in the work, and Team A and Team B cooperate to complete the task in another 8 days. How many days does it take Team B to do this project alone?
一项工程，甲队单独做需16天完成．现在甲队做了4天后，乙队参加工作，甲、乙两队合作又用8天完成了任务．求乙队单独做这项工程需要多少天？
<gadget id="calculator">1 / 16</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">(1/16) * 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) / 8</gadget>
<output>3/32 = around 0.09375</output>

<gadget id="calculator">(3/32) - (1/16)</gadget>
<output>1/32 = around 0.03125</output>

<gadget id="calculator">1 / (1/32)</gadget>
<output>32</output>

<result>32</result>