After adding the number to the numerator and denominator of the fraction (11/86), the fraction becomes (2/7).
分数(11/86)的分子和分母同时加上多少后，这时分数变为(2/7)．
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(2/7) * 86</gadget>
<output>172/7 = around 24.571429</output>

<gadget id="calculator">(172/7) - 11</gadget>
<output>95/7 = around 13.571429</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(95/7) / (5/7)</gadget>
<output>19</output>

<result>19</result>