In a trapezoidal orchard, the upper base is 54 meters, the lower base is 82 meters, and the height is 18 meters. One fruit tree is planted every 6 square meters. How many fruit trees are planted in this orchard?
一个梯形果园，上底是54米，下底是82米，高是18米，每6平方米栽一棵果树，这个果园共栽果树多少棵．
<gadget id="calculator">54 + 82</gadget>
<output>136</output>

<gadget id="calculator">18 / 2 / 6</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">136 * (3/2)</gadget>
<output>204</output>

<result>204</result>