The circumference of the base of a cylinder is 6.28 decimeters and the height is 3 decimeters. What is the lateral area of the cylinder in square decimeters?
一个圆柱体的底面周长是6.28分米，高3分米，这个圆柱的侧面积是多少平方分米．
<gadget id="calculator">6.28 * 3</gadget>
<output>18.84</output>

<result>18.84</result>