A cuboid, the sum of the lengths of the sides is 72 cm; the length is 10 cm, the width is 5 cm, and the height is in cm.
一个长方体，棱长之和是72厘米；长是10厘米，宽是5厘米，高是多少厘米．
<gadget id="calculator">72 / 4</gadget>
<output>18</output>

<gadget id="calculator">10 + 5</gadget>
<output>15</output>

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

<result>3</result>