There is a rectangular paper with a length of 30 cm and a width of 20 cm. Cut off four small squares with a side length of 2 cm from the four corners to make a cuboid paper box without a cover. What is the volume of the paper box?
有一张长30厘米、宽20厘米的长方形纸，从四角剪去边长为2厘米的四个小正方形后做成无盖长方体纸盒，该纸盒的容积是多少．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">30 - 4</gadget>
<output>26</output>

<gadget id="calculator">20 - 4</gadget>
<output>16</output>

<gadget id="calculator">26 * 16 * 2</gadget>
<output>832</output>

<result>832</result>