(9/14)*((0.4+(2/3))/(4/5)).
(9/14)*((0.4+(2/3))/(4/5))．
<gadget id="calculator">9 / 14</gadget>
<output>9/14 = around 0.642857</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">0.4 + (2/3)</gadget>
<output>1.066667</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1.066667 / (4/5)</gadget>
<output>1.333334</output>

<gadget id="calculator">(9/14) * 1.333334</gadget>
<output>0.857143</output>

<result>0.857143</result>