Paint the inner and outer sides of a cube iron box with a side length of 1.8 meters. What is the area of the painted part in square meters?
给一个棱长是1.8米的正方体铁箱内、外两面油漆一遍，油漆部分的面积是多少平方米？
<gadget id="calculator">1.8 * 1.8 * 6 * 2</gadget>
<output>38.88</output>

<result>38.88</result>