There are three vegetable greenhouses. A vegetable greenhouse covers an area of (2/3) hectare, B vegetable greenhouse covers an area of (5/6) hectare, and C vegetable greenhouse occupies less (7/12) hectare than the sum of A and B. ． How many hectares does the vegetable greenhouse cover?
有三个蔬菜大棚，甲蔬菜大棚占地(2/3)公顷，乙蔬菜大棚占地(5/6)公顷，丙蔬菜大棚占地比甲、乙两个占地总和少(7/12)公顷．丙蔬菜大棚占地多少公顷？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

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

<gadget id="calculator">(5/6) - (7/12)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/3) + (1/4)</gadget>
<output>11/12 = around 0.916667</output>

<result>11/12 = around 0.916667</result>