Calculation: (11/13)-(11/13)*(13/33).
计算：(11/13)-(11/13)*(13/33)．
<gadget id="calculator">11 / 13</gadget>
<output>11/13 = around 0.846154</output>

<gadget id="calculator">13 / 33</gadget>
<output>13/33 = around 0.393939</output>

<gadget id="calculator">(11/13) * (13/33)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(11/13) - (1/3)</gadget>
<output>20/39 = around 0.512821</output>

<result>20/39 = around 0.512821</result>