Just look at it. Think again if that's a price you are willing to pay. When he said it would be worth more than all the riches in the world, HE WASN'T KIDDING.
This fails after a while due to floating point estimations. This is a calculator for the rice and chessboard problem. It is set for a year, but if you see inside, it will be easy to change. Also, by day 195 you have a rice mass approximately the same as the universe.
