Question

it's urgent. In the story a shady plot ....the narrator murmured"Nine times nine is eighty-one!"
what does the statement means..???
It's in the paragraph 76

Answer 1

since the narrator had a hard day at work his mind was overworked ,he continued to think about the calculations and was very absent minded at that time . he must have been thinking about the calculation so he was murmuring   to himself "Nine times nine is eighty-one!". 

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