A square billet with a side length of 8 cm is melted and cast into a steel plate with a cross-section of 20 square centimeters. How long is this steel plate?
一块棱长为8厘米的正方体钢坯，熔铸成横截面为20平方厘米的钢板，这块钢板长多少？
<gadget id="calculator">8 / 20</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">8 * 8 * (2/5)</gadget>
<output>128/5 = around 25.6</output>

<result>128/5 = around 25.6</result>