A rectangular orchard is 450 meters long and 200 meters wide. On average, 500 fruit trees are planted per hectare. How many fruit trees are planted in total?
一个长方形果园长450米，宽200米，平均每公顷栽500棵果树，一共栽了多少棵果树？
<gadget id="calculator">200 / 10_000</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">450 * (1/50) * 500</gadget>
<output>4_500</output>

<result>4_500</result>