It takes 12 days for a project to be completed by Team A and Team B. If Team A works first for 3 days, and then Team B works for 8 days, the total (5/12) of the project is completed. Then, how many days will it take for team A to complete the project alone than the number of days for team B to complete the project alone?
一项工程由甲队和乙队合做需12天完成，若甲队先做3天后，再由乙队做8天，共完成了这项工程的(5/12)．那么，甲队单独完成这项工程的天数比乙队单独完成这项工程的天数要多多少天．
<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) * 3</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(5/12) - (1/4)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<gadget id="calculator">(1/6) / 5</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / (1/30)</gadget>
<output>30</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/12) - (1/30)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / (1/20)</gadget>
<output>20</output>

<gadget id="calculator">30 - 20</gadget>
<output>10</output>

<result>10</result>