cuboid with a square above it. The perimeter of the square is 8 decimeters, and the height of the cuboid is 5 decimeters. What is the sum of the lengths of the sides of the cuboid?
一个长方体，它的上面是一个正方形．正方形的周长是8分米，长方体高5分米，长方体的棱长之和是多少？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">8 + 8 + 20</gadget>
<output>36</output>

<result>36</result>