A cylindrical piece of wood is sawn into three equal cylinders, and the surface area is increased by 4 square meters compared to the original one. What is the original base area of the wood?
一根圆柱形木头，把它锯成相等的3段圆柱体，表面积比原来增加4平方米，那么原来木头的底面积是多少．
<gadget id="calculator">4 / 4</gadget>
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<result>1</result>