piece of iron sheet with a length of 32 cm is rectangular, and the four corners are cut off to make a square with a side length of 4 cm to make an iron box without a lid. It is known that the volume of the iron box is 1920 cubic centimeters, what is the area of the iron sheet in square centimeters?
一块长32厘米长方形铁皮，四角各剪去边长4厘米的正方形后，做成无盖铁盒．已知铁盒容积是1920立方厘米，这块铁皮的面积是多少平方厘米．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">32 - 8</gadget>
<output>24</output>

<gadget id="calculator">1_920 / 24 / 4</gadget>
<output>20</output>

<gadget id="calculator">20 + 8</gadget>
<output>28</output>

<gadget id="calculator">32 * 28</gadget>
<output>896</output>

<result>896</result>