To excavate a canal, engineering team A can complete this project in 9 days (3/4), and engineering team B can complete this project in 20 days (5/6). If A and B cooperate, they can complete this project in a few days ?
开挖一条水渠，甲工程队9天能完成这项工程的(3/4)，乙工程队20天能完成这项工程的(5/6)，若甲乙合作，几天可以完成这项工程？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) / 9</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) / 20</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(1/12) + (1/24)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / (1/8)</gadget>
<output>8</output>

<result>8</result>