The denominator of a fraction is reduced to (1/6), and the numerator is expanded to 10 (1/2) after being tripled. What is the original fraction?
一个分数的分母缩小到(1/6)，分子扩大为3倍后是10(1/2)，原来分数是多少
<gadget id="calculator">21 / 3</gadget>
<output>7</output>

<gadget id="calculator">2 * 6</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>