There are 8 small cubes with a side length of 3 cm. If you put them together to form a large cube, what is the total side length in cm?
有8个棱长为3厘米的小正方体，把它们拼成一个大的正方体，总棱长是多少厘米？
<gadget id="calculator">3 * 2 * 12</gadget>
<output>72</output>

<result>72</result>