The fractional unit is (1/9), the smallest false fraction is ((())/(())), and the largest true fraction is ((())/(())). How many of these two fractions are there in total? Such fractional units.
分数单位是(1/9)的最小假分数是((())/(()))，最大真分数是((())/(()))，这两个分数里一共有多少个这样的分数单位．
<gadget id="calculator">9 / 1</gadget>
<output>9</output>

<gadget id="calculator">9 + 8</gadget>
<output>17</output>

<result>17</result>