A cylindrical timber is 2 meters long. After it is cut into four equal sections, the surface area increases by 18.84 cm2. The original volume of this timber is______ cm3．

2 m = 200 cm, 18.84 △ 6 × 200 = 3.14 × 200 = 628 (cubic cm) a: the original volume of the cylinder is 628 cubic cm, so the answer is: 628

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