A silver wire can be welded into a square frame with a side length of 6 cm. If this wire is used to weld a rectangular parallelepiped frame of 9 cm and width of 6 cm, what is the height in cm?
用一银铁丝恰好可以焊接成棱长6厘米的正方体框架，如果用这根铁丝焊接成9厘米，宽6厘米的长方体框架，高是多少厘米．
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">9 + 6</gadget>
<output>15</output>

<gadget id="calculator">18 - 15</gadget>
<output>3</output>

<result>3</result>