After cutting a small cuboid with a volume of 18dm**3 from a cuboid, there is still a cube with an edge length of 3dm. What is the surface area of this cuboid?
从一个长方体上截下一个体积是18dm**3的小长方体后，还剩下一个棱长是3dm的正方体，原来这个长方体的表面积是多少？
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">18 / 9</gadget>
<output>2</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 * 5 * 4</gadget>
<output>60</output>

<gadget id="calculator">3 * 3 * 2</gadget>
<output>18</output>

<gadget id="calculator">60 + 18</gadget>
<output>78</output>

<result>78</result>