Cut off 2 decimeters horizontally, and the surface area will decrease 12.56 square decimeters.

Then the log diameter = 12.56/2/3. 14 = 2 decimeters.

Then the cross-sectional area = 3.14 *1*1= 3.14 square decimeter.

Transverse area = 2 * 3.14 * 2000 =12560 square decimeter.

Surface area =12560+2 * 3.14 =12566.28 square decimeter.

Volume = cross-sectional area * length = 3. 14 * 2000 = 6280 cubic decimeter.