There is a cube of iron with a side length of 4 decimeters that is melted and cast into a rectangular parallelepiped of iron with a width of 2.5 decimeters and a height of 1.6 decimeters. What is the length of the rectangular parallelepiped of iron?
有一个棱长4分米的正方体铁块熔铸成宽2.5分米，高1.6分米的长方体铁块，长方体铁块的长是多少分米？
<gadget id="calculator">4 * 4 * 4</gadget>
<output>64</output>

<gadget id="calculator">64 / 2.5 / 1.6</gadget>
<output>16</output>

<result>16</result>