For a simplest fraction, the numerator subtracts the smallest single digit that can be divisible by 2 and 3, and the denominator adds the smallest prime number. The reciprocal of the fraction obtained is 5 (1/4). What is the original simplest fraction?
一个最简分数，分子减去能被2、3整除的最小一位数，分母加上最小的质数，所得分数的倒数是5(1/4)，原来的最简分数是多少．
<gadget id="calculator">4 + 6</gadget>
<output>10</output>

<gadget id="calculator">21 - 2</gadget>
<output>19</output>

<gadget id="calculator">10 / 19</gadget>
<output>10/19 = around 0.526316</output>

<result>10/19 = around 0.526316</result>