The lengths of the three iron wires are 15 meters, 18 meters and 24 meters respectively. Now cut them into equal lengths. Each length should be as long as possible without excess. How many meters is each length?
三根铁丝的长分别是15米，18米和24米，现在把它们剪成每段相等的长度，每段尽量长一些，又不能有剩余，每段长多少米？
<result>3</result>