If a square frame with a side length of 6 cm is changed into a rectangular parallelepiped frame with a length of 9 cm and a width of 5 cm, what is the height of the rectangular parallelepiped frame in cm?
把一个棱长为6厘米的正方体框架改做成一个长9厘米，宽5厘米的长方体框架，这个长方体框架的高是多少厘米？
<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<gadget id="calculator">72 / 4</gadget>
<output>18</output>

<gadget id="calculator">18 - 9 - 5</gadget>
<output>4</output>

<result>4</result>