There is a piece of iron with a side length of 2 decimeters. Now it is to be forged into a cuboid with a cross-sectional area of 20 square centimeters. What is the length of this cuboid?
有一块棱长是2分米的正方体的铁块，现在要把它锻造成一个横截面积是20平方厘米的长方体，这个长方体的长是多少分米？
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / (1/5)</gadget>
<output>10</output>

<gadget id="calculator">2 * 2 * 10</gadget>
<output>40</output>

<result>40</result>