The numerator of a fraction is reduced to the original (1/3), and the denominator is enlarged by 3 times, the value of the fraction is reduced to the original value.
一个分数的分子缩小为原来的(1/3)，分母扩大3倍，分数值就缩小为原来的多少．
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<result>1/9 = around 0.111111</result>