The lateral expansion of a cylinder is a square with side length 8 cm. What is the lateral area of this cylinder in cm**2.
一个圆柱体的侧面展开是一个边长是8cm的正方形．这个圆柱的侧面积是多少cm**2．
<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<result>64</result>