There are nine fractions between (1/8) and (1/2). If the difference between any two adjacent fractions is the same, what is the sum of these eleven fractions?
在(1/8)和(1/2)之间有九个分数，如果任意相邻两个分数之差都相同，那么这十一个分数的总和是多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/8) + (1/2)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">11 / 2</gadget>
<output>11/2 = around 5.5</output>

<gadget id="calculator">(5/8) * (11/2)</gadget>
<output>55/16 = around 3.4375</output>

<result>55/16 = around 3.4375</result>