There is a cuboid stone with a length of 30 cm, a width of 18 cm, and a height of 15 cm. During processing, each of the 8 vertices is chiseled to form a small cube with a side length of 1 cm. What is the current surface area?
有一块长方体石料，长30厘米，宽18厘米，高15厘米，加工时把8个顶点各凿去一个棱长为1厘米的小正方体，现在的表面积是多少？
<gadget id="calculator">30 * 18</gadget>
<output>540</output>

<gadget id="calculator">30 * 15</gadget>
<output>450</output>

<gadget id="calculator">18 * 15</gadget>
<output>270</output>

<gadget id="calculator">540 + 450 + 270</gadget>
<output>1_260</output>

<gadget id="calculator">1_260 * 2</gadget>
<output>2_520</output>

<result>2_520</result>