After cutting a cylinder with a height of 1.5 decimeters into an approximate cuboid, the surface area increases by 6 decimeters square. What is the radius of the base of this cylinder in decimeters?
将一个高1.5分米的圆柱切拼成一根近似的长方体后，表面积增加了6平方分米，这个圆柱的底面半径是多少分米？
<gadget id="calculator">6 / 2 / 1.5</gadget>
<output>2</output>

<result>2</result>