Clever calculation: ((9/10)*(7/8)*(13/6))/((13/3)*(7/16)*(18/5)).
巧算：((9/10)*(7/8)*(13/6))/((13/3)*(7/16)*(18/5))．
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">13 / 6</gadget>
<output>13/6 = around 2.166667</output>

<gadget id="calculator">(9/10) * (7/8) * (13/6)</gadget>
<output>273/160 = around 1.70625</output>

<gadget id="calculator">13 / 3</gadget>
<output>13/3 = around 4.333333</output>

<gadget id="calculator">7 / 16</gadget>
<output>7/16 = around 0.4375</output>

<gadget id="calculator">18 / 5</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">(13/3) * (7/16) * (18/5)</gadget>
<output>273/40 = around 6.825</output>

<gadget id="calculator">(273/160) / (273/40)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>