Some equations have been solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
If9*7 = 32, 13*7 = 120, 17*9 = 208, then 19 * 11= ?
The pattern followed above is : $$a*b = (a+b) (a-b)$$
=> 19*11 = (19-11) (19+11)
= 8*30 = 240
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