Indian | A Nice Olympiads Trick | No Calculator Allowed

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[@jerrypaquette5470]

Is there any need to break it up like that. When you get 3^8, which equals 3^4 x 3^4 3^4 =81, It is not that difficult to multiply 81 x 81.

[@anthonyvalenti9093]

What happened to the 7^7?

[@gheffz]

In my head, 81.