There are 12 decimeters and 16 decimeters of iron wire, and they should be cut into several equal pieces without any surplus. What is the longest length of each piece of iron wire?
有12分米和16分米的铁丝各一根，要把他们剪成相等的几段而且没有剩余，每段铁丝最长是多少分米？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>