Cut off a square with a side length of 4 cm from the four corners of a rectangular iron sheet with a length of 48 cm and a width of 28 cm, and then weld it to form a box without a cover. What is the surface area of the box?
在一块长为48厘米、宽为28厘米的长方形铁皮的四个角上剪去边长为4厘米的正方形，然后将它焊成无盖的盒子，这个盒子的表面积是多少？
<gadget id="calculator">48 * 28</gadget>
<output>1_344</output>

<gadget id="calculator">4 * 4 * 4</gadget>
<output>64</output>

<gadget id="calculator">1_344 - 64</gadget>
<output>1_280</output>

<result>1_280</result>