The length, width and height of a cuboid are 90 cm, 75 cm and 60 cm respectively. If this cuboid is divided into several identical cubes, what is the longest edge length of each cube in cm?
一个长方体的长、宽、高分别是90厘米、75厘米和60厘米，如果将这个长方体分成几个完全相同的正方体，每个正方体的棱长最长是多少厘米？
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<result>15</result>