The perimeter of a big red column in an ancient building is 12.56 meters. What is the diameter of this cylinder in meters?
一个古代建筑中的大红圆柱的周长是12.56米．这个圆柱的直径是多少米？
<gadget id="calculator">12.56 / 3.14</gadget>
<output>4</output>

<result>4</result>