A trapezoidal orchard has an upper base of 58 meters, a lower base of 44 meters, and a height of 20 meters. If one apple tree can be planted per 4 square meters, how many apple trees can be planted in this land?
一个梯形果园，上底58米，下底44米，高20米，如果每4平方米可种一棵苹果树，这块地共可栽多少棵苹果树？
<gadget id="calculator">58 + 44</gadget>
<output>102</output>

<gadget id="calculator">20 / 2 / 4</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">102 * (5/2)</gadget>
<output>255</output>

<result>255</result>