Cut two ropes with a length of 12dm and 16dm into several small pieces of equal length without any residue, what is the longest length of each piece in dm
把长为12dm和16dm的两根绳子，剪成长度相等的若干小段而没有剩余，每段最长是多少dm
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>