Title: Did not work for 50 X 75
Product review: I tried it with 50 x 75Ok each number subtracted from 100 = 50 and 25Diagonal subtraction of either gives me 25 for my first partSo 50 x 75 = 25....and 25 x 25 = 625and so I add those digits to the first part and should get 25625.Well I get 3750 on the calculator.It does not seem fail safe.
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