What is the sum of the largest true fraction and the smallest false fraction whose unit of fraction is (1/11).
分数单位是(1/11)的最大真分数和最小假分数的和是多少．
<gadget id="calculator">11 / 1</gadget>
<output>11</output>

<gadget id="calculator">10 / 11</gadget>
<output>10/11 = around 0.909091</output>

<gadget id="calculator">11 / 11</gadget>
<output>1</output>

<gadget id="calculator">(10/11) + 1</gadget>
<output>21/11 = around 1.909091</output>

<result>21/11 = around 1.909091</result>