Simple calculation: 40%/9+(1/9)*(1/5).
简算：40%/9+(1/9)*(1/5)．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / 9</gadget>
<output>2/45 = around 0.044444</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/9) * (1/5)</gadget>
<output>1/45 = around 0.022222</output>

<gadget id="calculator">(2/45) + (1/45)</gadget>
<output>1/15 = around 0.066667</output>

<result>1/15 = around 0.066667</result>