For a fraction, the sum of the numerator and the denominator is 48. If 6 is added to the numerator, the fraction is equal to 1. What is the original fraction?
一个分数，分子与分母的和是48，如果分子加上6，这个分数就等于1，这个分数原来是多少？
<gadget id="calculator">6 + 48</gadget>
<output>54</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">54 / 2</gadget>
<output>27</output>

<gadget id="calculator">27 - 6</gadget>
<output>21</output>

<gadget id="calculator">21 / 27</gadget>
<output>7/9 = around 0.777778</output>

<result>7/9 = around 0.777778</result>