The numerator of a simplest fraction is enlarged by 4 times, and the denominator is exactly equal to 10 after being reduced by 3 times, so what is the simplest fraction?
一个最简分数的分子扩大4倍，分母缩小3倍后正好等于10，那么这个最简分数是多少．
<gadget id="calculator">4 * 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>