In a parallelogram nursery, a total of 1,200 saplings are planted, with an average of 4 saplings per square meter. The bottom of this nursery is about 15 meters high. How many meters is it high?
一块平行四边形苗圃，共栽树苗1200棵，平均每平方米栽4棵．这个苗圃的底是15来，它的高是多少米？
<gadget id="calculator">1_200 / 4</gadget>
<output>300</output>

<gadget id="calculator">300 / 15</gadget>
<output>20</output>

<result>20</result>