A rectangular iron sheet with a length of 26 cm and a width of 16 cm is cut off from its four corners to form a square with a side length of 3 cm, and then welded into an iron box without a lid. What is the volume of this iron box in milliliters?
一块长方形铁皮，长26厘米，宽16厘米，在它的四个角上都剪去边长为3厘米的正方形，然后焊接成一个无盖的铁盒，求这个铁盒的容积是多少毫升？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">26 - 6</gadget>
<output>20</output>

<gadget id="calculator">16 - 6</gadget>
<output>10</output>

<gadget id="calculator">20 * 10 * 3</gadget>
<output>600</output>

<result>600</result>