The sum of the sides of a cuboid is 80 cm, the length is 12 cm, the width is 6 cm, and the height is cm.
一个长方体的棱长总和80厘米，其中长是12厘米，宽是6厘米，高是多少厘米．
<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<gadget id="calculator">12 + 6</gadget>
<output>18</output>

<gadget id="calculator">20 - 18</gadget>
<output>2</output>

<result>2</result>