A square billet with a side length of 8 decimeters is forged into a cuboid steel with a cross-sectional area of 0.4 square meters. What is the length of the forged steel in meters?
把一块棱长8分米的正方体钢坯，锻造成横截面的面积是0.4平方米的长方体钢材，锻造成的钢材的长度是多少米．
<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 0.4</gadget>
<output>2</output>

<gadget id="calculator">(4/5) * (4/5) * 2</gadget>
<output>32/25 = around 1.28</output>

<result>32/25 = around 1.28</result>