Reduce the numerator of (6/9) to the original (1/3). To keep the size of the fraction unchanged, the denominator should be the same.
把(6/9)的分子缩小到原来的(1/3)，要使分数的大小不变，分母也应该多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>