Put two identical cubes together to form a cuboid. The volume of this cuboid is 54 cubic centimeters. What is the length of the sides of the cube in centimeters?
把两个相同的正方体拼成一个长方体，这个长方体的体积是54立方厘米，正方体的棱长是多少厘米．
<result>3</result>