project can be completed by engineering team A alone in 12 days. Now (1/4) of this project is completed by other engineering teams first, and then engineering team A can do it alone. It will take a few more days Complete the whole project?
一项工程，由甲工程队单独做12天可完成全工程，现先由别的工程队做完这项工程的(1/4)后，再由甲工程队单独做，还要几天可完成全工程？
<gadget id="calculator">1 / 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">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(3/4) / (1/12)</gadget>
<output>9</output>

<result>9</result>