If the numerator of a simplest fraction is expanded by 6 times and the denominator is reduced by 3 times, it can be reduced to 12. What is the simplest fraction?
将一个最简分数的分子扩大6倍，分母缩小3倍后，可以化成12，这个最简分数是多少．
<gadget id="calculator">1 * 3</gadget>
<output>3</output>

<gadget id="calculator">12 / 6 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>