((11/12)-(5/7))*(7/11).
((11/12)-(5/7))*(7/11)．
<gadget id="calculator">11 / 12</gadget>
<output>11/12 = around 0.916667</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(11/12) - (5/7)</gadget>
<output>17/84 = around 0.202381</output>

<gadget id="calculator">7 / 11</gadget>
<output>7/11 = around 0.636364</output>

<gadget id="calculator">(17/84) * (7/11)</gadget>
<output>17/132 = around 0.128788</output>

<result>17/132 = around 0.128788</result>