This calculator with integrated soroban abacus is fabulous. A soroban (算盤, そろばん) is a Japanese abacus. I’ve seen Japanese people that can use a soroban and are able to make quite complex calculations with it much faster than with a calculator.
To learn how to use a soroban this PDF is great.
2 replies on “Calculator with integrated soroban abacus”
That’s really cool
eu acho o soroban muito mais fasil pra fezer conta