Calculation: (1/11)+(1/13)+(1/15)+(1/17).
计算：(1/11)+(1/13)+(1/15)+(1/17)．
<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">1 / 13</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / 17</gadget>
<output>1/17 = around 0.058824</output>

<gadget id="calculator">(1/11) + (1/13) + (1/15) + (1/17)</gadget>
<output>10_696/36_465 = around 0.293322</output>

<result>10_696/36_465 = around 0.293322</result>