There are two iron wires, one is 54 meters long and the other is 72 meters long. They must be cut into small sections of the same length without any excess. How many meters is the longest of each section?
有两根铁丝，一根长54米，另一根长72米，要把它们截成同样长的小段，不准有剩余，每段最长有多少米？
<gadget id="calculator">2 * 3 * 3</gadget>
<output>18</output>

<result>18</result>