A cuboid, its base is a square with an area of 3 square decimeters, and its side is also a square, then how many square decimeters is the side area of this cuboid?
一个长方体，它的底面是一个面积为3平方分米的正方形，侧面展开也是一个正方形，那么这个长方体的侧面积是多少平方分米？
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3 * 16</gadget>
<output>48</output>

<result>48</result>