If a cylindrical piece of wood with a length of 1.5 meters and a base radius of 1 decimeter is cut into two cylinders, what is the increase in the surface area by how many square decimeters?
把一根长1.5米，底面半径1分米的圆柱形木材截成2个圆柱，表面积增加多少平方分米．
<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 2</gadget>
<output>6.28</output>

<result>6.28</result>