Calculation: ((7/8)-(5/6))/((2/9)+(1/12))=how much.
计算：((7/8)-(5/6))/((2/9)+(1/12))=多少．
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(7/8) - (5/6)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(2/9) + (1/12)</gadget>
<output>11/36 = around 0.305556</output>

<gadget id="calculator">(1/24) / (11/36)</gadget>
<output>3/22 = around 0.136364</output>

<result>3/22 = around 0.136364</result>