A cuboid cardboard with an area of 38dm**2 can be used to form a cylinder with a base circumference of 9.5dm. What is the height of this cylinder in dm?
用一块面积是38dm**2的长方体纸板，可以围成一个底面周长是9.5dm的圆柱，这个圆柱的高是多少dm．
<gadget id="calculator">38 / 9.5</gadget>
<output>4</output>

<result>4</result>