A cuboid becomes a cube after its height increases by 5 decimeters, and its surface area increases by 160 decimeters**2. What is the length of the original cuboid in decimeters
一个长方体，高增加5分米后，变成一个正方体，表面积增加了160分米**2，原来长方体的长是多少分米
<gadget id="calculator">160 / 5</gadget>
<output>32</output>

<gadget id="calculator">32 / 4</gadget>
<output>8</output>

<result>8</result>