A parallelogram is a cornfield with a base of 1 km and a height of 18 meters. If one fruit tree is planted every 9 square meters, how many fruit trees can be planted in this orchard?
一块平行四边形的玉米地，底是1千米，高是18米．如果每9平方米栽一棵果树，这个果园大约可以栽多少棵果树？
<gadget id="calculator">18 / 9</gadget>
<output>2</output>

<gadget id="calculator">1 * 1_000 * 2</gadget>
<output>2_000</output>

<result>2_000</result>