The sum of the numerator and denominator of a fraction is 221. After the division, we get (8/9). What is the original fraction?
一个分数分子分母的和是221，约分后得(8/9)，原分数是多少．
<gadget id="calculator">8 + 9</gadget>
<output>17</output>

<gadget id="calculator">8 / 17</gadget>
<output>8/17 = around 0.470588</output>

<gadget id="calculator">9 / 17</gadget>
<output>9/17 = around 0.529412</output>

<gadget id="calculator">221 * (9/17)</gadget>
<output>117</output>

<gadget id="calculator">(8/17) / 117</gadget>
<output>8/1_989 = around 0.004022</output>

<gadget id="calculator">221 * (8/1_989)</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>