A trapezoidal apple orchard has an upper base of 45 meters, a lower base of 55 meters, and a height of 30 meters. Each apple tree covers an area of 5 square meters. How many fruit trees can be planted in this apple orchard?
一个梯形的苹果园，上底45米，下底55米，高30米．每棵苹果树占地5平方米，这个苹果园可以种多少棵果树？
<gadget id="calculator">45 + 55</gadget>
<output>100</output>

<gadget id="calculator">30 / 2 / 5</gadget>
<output>3</output>

<gadget id="calculator">100 * 3</gadget>
<output>300</output>

<result>300</result>