Take a square billet with a side length of 0.4 meters and forge it into a cuboid steel with a cross-sectional area of 0.8 square meters. How long is the forged steel?
把一块棱长0.4米的正方体钢坯，煅成横截面积是0.8平方米的长方体钢材，煅成的钢材有多长？
<gadget id="calculator">0.4 / 0.8</gadget>
<output>0.5</output>

<gadget id="calculator">0.4 * 0.4 * 0.5</gadget>
<output>0.08</output>

<result>0.08</result>