A cuboid is 5dm long, 4dm wide, and 3dm high. Among its 6 faces, how much dm**2 is the area of the largest face larger than the area of the smallest face?
一个长方体长5dm，宽4dm，高3dm．在它的6个面中，最大的一个面的面积比最小的一个面的面积多多少dm**2．
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">20 - 12</gadget>
<output>8</output>

<result>8</result>