A piece of iron wire can just make a square with a side length of 8 decimeters. What is the length of this piece of iron wire in decimeters?
一段铁丝刚好能做成一个边长是8分米的正方形，这段铁丝长多少分米．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>