Master Li processed 120 parts, and processed (1/4) of this batch of parts in 3 days. Then, how many days will it take to process ((())/(())) of this batch of parts every day? ．
李师傅加工120个零件，3天加工了这批零件的(1/4)，那么，每天加工这批零件的((())/(()))，加工完这批零件还要多少天．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

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

<gadget id="calculator">12 - 3</gadget>
<output>9</output>

<result>9</result>