If the numerator of a fraction is reduced by 2 times and the denominator is enlarged by 2 times, then (1/8) is obtained. What is the original fraction?
把一个分数的分子缩小2倍，分母扩大2倍后得(1/8)，原分数是多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">(1/8) * 4</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>