The sum of the side lengths of a cuboid is 72 cm, and the base is a square with a side length of 3 cm. What is its height in cm?
一个长方体的棱长的和是72厘米，底面是边长3厘米的正方形，它的高是多少厘米．
<gadget id="calculator">3 * 8</gadget>
<output>24</output>

<gadget id="calculator">72 - 24</gadget>
<output>48</output>

<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<result>12</result>