It takes 24 days for engineering team A to dig a canal in a new rural area, and 12 days for engineering team B to dig alone. Now two engineering teams are working together to excavate, how many days will it take to complete?
新农村要开挖一条水渠，甲工程队单独挖需要24天，乙工程队单独挖需要12天．现在两个工程队共同开挖，需要多少天才能完成？
<gadget id="calculator">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

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

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

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

<result>8</result>