Calculation: 1-5/12-(7/12).
计算：1-5/12-(7/12)．
<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">1 - (5/12) - (7/12)</gadget>
<output>0</output>

<result>0</result>