The base of a cuboid is a square with a side length of 2 cm, and its side view is also a square. What is the side area of the cuboid in square centimeters?
一个长方体的底面是一个边长为2厘米的正方形，它的侧面展开图正好也是一个正方形，这个长方体的侧面积是多少平方厘米．
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>