On the floor plan with a scale of 1:250, the length of a teaching building is measured to be 16 cm. What is the actual length of this teaching building in meters?
在比例尺是1：250的平面图上，量得一幢教学楼长16厘米，这幢教学楼的实际长度是多少米？
<gadget id="calculator">1 / 250</gadget>
<output>1/250 = around 0.004</output>

<gadget id="calculator">16 / (1/250)</gadget>
<output>4_000</output>

<gadget id="calculator">4_000 / 100</gadget>
<output>40</output>

<result>40</result>