After cutting a cylinder with a height of 10 decimeters into two cylinders, the surface area increases by 36 decimeters squared. What is the volume of the original cylinder?
把一个高是10分米的圆柱体截成两个圆柱体后，表面积增加了36平方分米，原来圆柱体的体积是多少．
<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">18 * 10</gadget>
<output>180</output>

<result>180</result>