A square iron billet with a side length of 4 decimeters is to be forged into a rectangular parallelepiped iron plate with a length of 2 decimeters and a width of 8 decimeters. What is the thickness of this iron plate?
一个棱长是4分米的正方体铁坯，现在要把它锻造成一个长2分米、宽8分米的长方体铁板，这个铁板的厚度是多少分米？
<gadget id="calculator">2 * 8</gadget>
<output>16</output>

<gadget id="calculator">4 / 16</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">4 * 4 * (1/4)</gadget>
<output>4</output>

<result>4</result>