Story 2 : Chessboard Maths

Story 2 : Chessboard Maths

Once upon a time there was a wise courtier, who presented the King with a chessboard. King was moved by the gesture & gift, said to him :'Tell me how I can thank you?'
The courtier replied, 'Your highness, I want nothing more than for you to cover the chessboard with rice. Put 1 grain of rice on the first square, and then on every subsequent square twice the previous number of grains.'
What happens next.

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