Rongrong’s family bought a basket of apples, Dad ate (1/3) of it, Rongrong ate (1/4), and the rest was eaten by mother, if Dad ate 3 more apples than Rongrong How many apples did mother eat?
荣荣家买来一筐苹果，爸爸吃了其中的(1/3)，荣荣吃了其中的(1/4)，剩下的都是妈妈吃的，如果爸爸比荣荣多吃了3个苹果，那么，妈妈吃了多少个．
<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>1/12 = around 0.083333</output>

<gadget id="calculator">3 / (1/12)</gadget>
<output>36</output>

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

<gadget id="calculator">36 * (5/12)</gadget>
<output>15</output>

<result>15</result>