The denominator of a fraction is reduced to (1/3), 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(1/3)，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">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / (1/3)</gadget>
<output>6</output>

<gadget id="calculator">7 / 6</gadget>
<output>7/6 = around 1.166667</output>

<result>7/6 = around 1.166667</result>