A cylinder, when its sides are unfolded, is a square with a side length of 9.42 decimeters. What is the diameter of the base of this cylinder?
一个圆柱，侧面展开后是一个边长9.42分米的正方形．这个圆柱的底面直径是多少分米？
<gadget id="calculator">9.42 / 3.14</gadget>
<output>3</output>

<result>3</result>