This is the abacus of good luck. "KAIUN" means a good fate is obtained. You can foretell your fortune by pushing the fortune button. Of course, you are able to calculate with this abacus. Please handle the bead on an abacus carefully. The numerical value is input to the abacus, and, the "+", "-", "*", "/" button is pushed. It is computable like the electric calculator. When C button is pushed, the numerical value is cleared.