Submerge a cube stone with an edge length of 1.6 decimeters into a cuboid tank, the water level rises by 4.8 decimeters, then put an iron block and submerge it, the water level rises by 0.9 decimeters, what is the volume of the iron block?
将棱长是1.6分米的正方体石块浸没到一个长方体水槽里，水面上升了4.8分米，然后放入一个铁块并浸没，水面上升了0.9分米，求铁块的体积？
<gadget id="calculator">1.6 / 4.8</gadget>
<output>0.333333</output>

<gadget id="calculator">1.6 * 1.6 * 0.333333 * 0.9</gadget>
<output>0.767999</output>

<result>0.767999</result>