A method of implementing a calculator for blind people is provided and includes: providing a user interface on a screen of an electrical device, in which the user interface includes an increment button and a decimal button; performing a nested multiplication input approach through the increment button to obtain a first operand, in which the decimal button is used to enter a decimal mode; determining an operator according to the number of times the decimal button is pressed; performing the nested multiplication input approach through the increment button to obtain a second operand; obtaining a calculation result according to the first operand, the operator, and the second operand, and outputting an audio signal corresponding to the calculation result through the microphone of the electrical device.