The school has a rectangular land, 35 meters long and 40 meters wide. On average, one tree is planted per 4 square meters. How many saplings should the school prepare?
学校有一块长方形地，长35米，宽40米．平均每4平方米栽一棵树，学校需准备树苗多少棵？
<gadget id="calculator">35 * 40 * 4</gadget>
<output>5_600</output>

<result>5_600</result>