The sum of the side lengths of a cuboid and a cube is equal. If the length, width and height of the cuboid are 4 cm, 3 cm and 2 cm respectively, what is the side length of the cube in cm?
一个长方体与一个正方体棱长之和相等，已知长方体的长、宽、高分别为4厘米、3厘米、2厘米，那么正方体的棱长是多少厘米．
<gadget id="calculator">4 + 3 + 2</gadget>
<output>9</output>

<gadget id="calculator">4 / 12</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 * (1/3)</gadget>
<output>3</output>

<result>3</result>