For a fraction, the sum of the numerator and the denominator is 128. If the numerator is multiplied by 3, the fraction is equal to 1. What is the original fraction?
一个分数，分子与分母的和是128，如果分子乘3，这个分数就等于1，原分数是多少？
<gadget id="calculator">3 * 128</gadget>
<output>384</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">384 / 4</gadget>
<output>96</output>

<gadget id="calculator">128 - 96</gadget>
<output>32</output>

<gadget id="calculator">32 / 96</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>