A rectangular green space is 24 meters wide, and the length is twice the width. If 4 pine trees are planted per square meter on this green space, how many saplings should be prepared?
一块长方形绿地，宽24米，长是宽的2倍，如果在这块绿地上每平方米种4棵松树，应准备树苗多少棵？
<gadget id="calculator">24 * 2 * 24 * 4</gadget>
<output>4_608</output>

<result>4_608</result>