What is the surface area of a cubic box without a lid whose sides are 4 decimeters long?
一个棱长4分米的无盖立方体盒子，它的表面积是多少平方分米？
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">16 * 5</gadget>
<output>80</output>

<result>80</result>