Changxin Primary School transported 640 saplings, and distributed them to 16 classes on average for planting. How many saplings were planted in each class?
长新小学运来640棵树苗，平均分给16个班栽种，每个班栽种多少棵？
<gadget id="calculator">640 / 16</gadget>
<output>40</output>

<result>40</result>