There is an orchard approximately parallelogram with a base of 280 meters and a height of 135 meters. On average, each fruit tree covers an area of 4.5 square meters. How many fruit trees can be planted in total?
有一块近似平行四边形的果园，底是280米，高135米．平均每棵果树占地4.5平方米，一共能栽多少棵果树？
<gadget id="calculator">135 / 4.5</gadget>
<output>30</output>

<gadget id="calculator">280 * 30</gadget>
<output>8_400</output>

<result>8_400</result>