Simple calculation: (40/13)*(26/(40/3)).
简便运算：(40/13)*(26/(40/3))．
<gadget id="calculator">40 / 13</gadget>
<output>40/13 = around 3.076923</output>

<gadget id="calculator">40 / 3</gadget>
<output>40/3 = around 13.333333</output>

<gadget id="calculator">26 / (40/3)</gadget>
<output>39/20 = around 1.95</output>

<gadget id="calculator">(40/13) * (39/20)</gadget>
<output>6</output>

<result>6</result>