The sum of the sides of a cuboid is 100 cm, its length is 11 cm, its width is 9 cm, what is its height?
一个长方体的棱长和是100厘米，它的长是11厘米，宽是9厘米，高是多少．
<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">25 - 11 - 9</gadget>
<output>5</output>

<result>5</result>