Plant saplings in an open space with a length of 20 meters and a width of 16 meters. On average, 4 trees are planted per square meter. How many saplings can be planted in this land?
在一块长20米，宽16米的空地上栽树苗．平均每平方米栽4棵，这块地一共可以栽多少棵树苗？
<gadget id="calculator">20 * 16 * 4</gadget>
<output>1_280</output>

<result>1_280</result>