The sum of the sides of a cuboid is 140cm, and its length and width are both 14cm. What is the height of the cuboid in cm?
一个长方体的棱长之和是140cm，它的长和宽都是14cm，这个长方体的高是多少cm．
<gadget id="calculator">140 / 4</gadget>
<output>35</output>

<gadget id="calculator">14 + 14</gadget>
<output>28</output>

<gadget id="calculator">35 - 28</gadget>
<output>7</output>

<result>7</result>