The numerator of a fraction is divided by 3, and the denominator multiplied by 3 is (1/12). The original fraction is ((())/(())).
一个分数的分子除以3，分母乘3后是(1/12)．原来这个分数是((())/(()))．
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">(1/12) * 9</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>