A cylinder with a height of 8 cm is expanded along the height to obtain a square. What is the lateral area of the cylinder in cm**2.
一个高8cm的圆柱体侧面沿高展开后得到一个正方形，圆柱体的侧面积是多少cm**2．
<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>