There is a trapezoidal orchard, the upper base is 40 meters, the lower base is 80 meters, and the height is 30 meters. If one tree is planted every 8 square meters, how many trees can be planted in this orchard?
有一个梯形果园，上底是40米，下底是80米，高是30米．如果每8平方米栽一棵树，那么这个果园一共能栽多少棵树？
<gadget id="calculator">40 + 80</gadget>
<output>120</output>

<gadget id="calculator">30 / 2 / 8</gadget>
<output>15/8 = around 1.875</output>

<gadget id="calculator">120 * (15/8)</gadget>
<output>225</output>

<result>225</result>