A cube billet with an edge length of 0.5 meters is forged into a cuboid steel with a cross-sectional area of 10 square decimeters. What is the length of forging.
把一个棱长是0.5米的正方体钢坯，锻成横截面面积是10平方分米的长方体钢材．锻成的长是多少．
<gadget id="calculator">0.5 * 10</gadget>
<output>5</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5 * 5 * (1/2)</gadget>
<output>25/2 = around 12.5</output>

<result>25/2 = around 12.5</result>