cylinder with a base circumference of 8 decimeters can be expanded to form a square. What is the lateral area of this cylinder in square decimeters?
一个底面周长8分米的圆柱，侧面展开后可以得到一个正方形．这个圆柱的侧面积是多少平方分米？
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>