Probably nothing, since I suspect that it is incorrect.
It could be the formula for 2 times the area of a trapezium, where
A = Area
b1 and b2 are the lengths of the parallel sides
and h is the vertical distance (height) between them.
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2 times pi times the radius squared plus 2 times pi times the radius times the height equals surface area of a cylinder :]
144 Formula: c= (a2)+(ab)
1 plus 1 plus 1 plus 1 equals 1 times 4. 1 times 4 equals 4. 4 minus 4 equals 0. 0
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