piece of iron with a side length of 80 centimeters is now melted and cast into a cuboid with a longitudinal section area of 200 square centimeters. What is the length of this cuboid in centimeters?
在一块棱长是80厘米的正方体的铁块，现在要把它熔铸成一个纵切面面积200平方厘米的长方体，这个长方体的长是多少厘米？
<gadget id="calculator">80 / 200</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">80 * 80 * (2/5)</gadget>
<output>2_560</output>

<result>2_560</result>