There is a cylinder whose sides are unfolded to form a rectangle. The length of this rectangle is 8cm and the width is 4cm. What is the ratio of the circumference of its base to its height?
有一个圆柱体，它的侧面展开后正好是一个长方形，这个长方形的长是8cm、宽是4cm，则它的底面周长与高的比值是多少．
<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<result>2</result>