A trapezoidal forest has an upper base of 22 meters, a lower base of 28 meters, and a height of 18 meters. There are 75 trees planted in the forest. How many square meters does each tree occupy on average?
一片呈梯形状的树林，上底是22米，下底是28米，高18米，树林中共栽了75棵树，平均每棵树占地多少平方米？
<gadget id="calculator">22 + 28</gadget>
<output>50</output>

<gadget id="calculator">18 / 2 / 75</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">50 * (3/25)</gadget>
<output>6</output>

<result>6</result>