There is a fraction, adding 1 to the numerator, can be reduced to (1/2), and subtracting 1 from the numerator, can be reduced to (1/4), what is the fraction?
有一个分数，分子加1，可约简为(1/2)，分子减1，可约简为(1/4)，则这个分数是多少．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>