The numerator of a simplest fraction is expanded by 4 times, the denominator is reduced to (1/3), and simplified to 10, what is the fraction?
一个最简分数的分子扩大4倍，分母缩小到(1/3)，化简为10，该分数是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 / (1/3)</gadget>
<output>12</output>

<gadget id="calculator">10 / 12</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>