A square billet with a side length of 2 decimeters can be melted and cast into a rectangular parallelepiped steel with a square side length of 0.4 decimeters in cross section. How many meters is this steel?
用一块棱长是2分米的正方体钢坯，可镕铸成横截面是正方形边长0.4分米的长方体钢材，这个钢材长多少米．
<gadget id="calculator">0.4 * 0.4</gadget>
<output>0.16</output>

<gadget id="calculator">2 / 0.16 / 10</gadget>
<output>1.25</output>

<gadget id="calculator">2 * 2 * 1.25</gadget>
<output>5</output>

<result>5</result>