A cylindrical paper tube, the circumference of its base is 32 cm, and its side is a square, find its side area.
一个圆柱形纸筒，它的底面周长是32厘米，侧面展开是一个正方形，求它的侧面积．
<gadget id="calculator">32 * 32</gadget>
<output>1_024</output>

<result>1_024</result>