There is a rectangular cardboard with a length of 20 cm and a width of 14 cm. First, cut off a square with a side length of 2 cm at each of its four corners, and fold it into a cuboid carton without a cover. What is the volume of this carton in ml?
有一张长20cm宽14cm的长方形硬纸板，先在它的四个角各剪去边长是2cm的正方形，折成一个无盖的长方体纸盒，这个纸盒的容积是多少ml？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

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

<gadget id="calculator">14 - 4</gadget>
<output>10</output>

<gadget id="calculator">16 * 10 * 2</gadget>
<output>320</output>

<result>320</result>