A steel block with a side length of 12 decimeters is melted and cast into a rectangular parallelepiped steel bar with a width of 4 decimeters and a height of 8 decimeters. What is the length of this steel bar?
把一块棱长是12分米的正方体的钢块，熔铸成宽4分米，高8分米的长方体钢条，这根钢条的长是多少？
<gadget id="calculator">12 ** 3</gadget>
<output>1_728</output>

<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<gadget id="calculator">1_728 / 32</gadget>
<output>54</output>

<result>54</result>