There are three iron wires, which are 16 meters, 20 meters and 24 meters long respectively. First, cut them into small sections of the same length, and no surplus is allowed. How many meters is the longest of each section?
有三根铁丝，分别长16米，20米和24米，先在把它们截成同样长的小段，不许剩余，每段最长有多少米？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>