Calculate with a simple method: 12*((3/4)-(1/2)+(5/6)).
用简便方法计算：12*((3/4)-(1/2)+(5/6))．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/4) - (1/2)</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) + (5/6)</gadget>
<output>13/12 = around 1.083333</output>

<gadget id="calculator">12 * (13/12)</gadget>
<output>13</output>

<result>13</result>