If the side surface of a cylinder is a square, if the perimeter of its base is 15 square centimeters, what is the lateral area of the cylinder in square centimeters?
一个圆柱侧面展开是一个正方形，如果它的底面周长是15平方厘米，那么这个圆柱的侧面积是多少平方厘米．
<gadget id="calculator">15 * 15</gadget>
<output>225</output>

<result>225</result>