A 1.2-meter-long round steel is sawed into two small sections of 0.6-meter-long. The surface area increases by 12.56 square centimeters. What is the original volume of this round steel?

The surface area increases the area of the two bottom areas
Area of two bottom areas = 12.56
Floor area = 6.28 square centimeter
Volume = base area * length
=6.28 * 120 (pay attention to the unity of units)
=753.6 cm3

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