If the perimeter of the base of a cube is 12 cm, what is the sum of its sides in cm?
一个正方体的底面周长是12cm，它的棱长和是多少cm．
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 12</gadget>
<output>36</output>

<result>36</result>