Simple calculation: (11/23)*(7/9)/(22/23).
简便计算：(11/23)*(7/9)/(22/23)．
<gadget id="calculator">11 / 23</gadget>
<output>11/23 = around 0.478261</output>

<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">22 / 23</gadget>
<output>22/23 = around 0.956522</output>

<gadget id="calculator">(7/9) / (22/23)</gadget>
<output>161/198 = around 0.813131</output>

<gadget id="calculator">(11/23) * (161/198)</gadget>
<output>7/18 = around 0.388889</output>

<result>7/18 = around 0.388889</result>