A section of cuboid wood is 1 meter long. If it is sawed off for 2 cm, its volume will be reduced by 20 cubic cm. What is the original volume of this section of wood? (detailed thinking)

Let the original volume be x cubic centimeter
X：1*100=20：2
2X=20*100
X=1000
The original volume is 1000 cubic centimeters
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