For a bag of noodles, (1/3) of the total amount is used for the first time, and (1/4) of the total amount is used for the second time. At this time, the amount used is 3 kilograms more than the rest. How many kilograms are there in total in this bag of noodles? ?
一袋面，第一次用了总数的(1/3)，第二次用了总数的(1/4)，这时，用去的比剩下的多3千克，这袋面共有多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) + (1/4)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">1 - (1/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(7/12) - (5/12)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">3 / (1/6)</gadget>
<output>18</output>

<result>18</result>