After adding the numerator and denominator of (1/9), it can be roughly divided into (3/5).
(1/9)的分子、分母同时加上多少后，约分为(3/5)．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 9</gadget>
<output>27/5 = around 5.4</output>

<gadget id="calculator">(27/5) - 1</gadget>
<output>22/5 = around 4.4</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(22/5) / (2/5)</gadget>
<output>11</output>

<result>11</result>