In front of the teaching building is a rectangular green space. The measured area of this green space is 399.9 square meters and its width is 15.5 meters. So how long is this green space in meters?
教学楼的前面是一块长方形的绿地，经测量这块绿地的面积是399.9平方米，宽15.5米，那么这块绿地的长是多少米？
<gadget id="calculator">399.9 / 15.5</gadget>
<output>25.8</output>

<result>25.8</result>