A rectangular iron sheet is 26 decimeters long and 18 decimeters wide. Cut off a square with a side length of 3 decimeters from its four corners and weld it into a cuboid. What is the volume of this cuboid in liters?
一张长方形铁皮长26分米，宽18分米，在它的四个角剪去边长3分米的正方形，焊成一个长方体，这个长方体的容积是多少升？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

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

<gadget id="calculator">18 - 6</gadget>
<output>12</output>

<gadget id="calculator">20 * 12 * 3</gadget>
<output>720</output>

<result>720</result>