The side view of a cylinder is a square with a side length of 6.28 meters, so what is wrong with the following statement is the diameter of the base of the cylinder in meters
一个圆柱的侧面展开图是边长6.28米的正方形，那么下面说法不对的是这个圆柱的底面直径是多少米
<result>6.28</result>