A trapezoidal orchard with an upper base of 72 meters, a lower base of 96 meters and a height of 40 meters. A total of 280 peach trees are planted in this orchard. How many square meters does each peach tree occupy on average?
一块梯形果园，上底72米，下底96米，高40米．这块果园共种桃树280棵，平均每棵桃树占地多少平方米？
<gadget id="calculator">72 + 96</gadget>
<output>168</output>

<gadget id="calculator">40 / 2 / 280</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">168 * (1/14)</gadget>
<output>12</output>

<result>12</result>