A calculator includes a display, and a processor, wherein the processor is configured to perform processes including: receiving a selection operation of a calculation function type; receiving an input operation of calculation object data according to the selected calculation function type; displaying calculation result data obtained by a calculation based on the input calculation object data on the display; converting at least one of the calculation object data and the calculation result data into a two-dimensional code according to (i) the selected calculation function type and (ii) both of an input state of the calculation object data and a display state of the calculation result data during an output operation for outputting external data; and outputting, as the external data, an image of the two-dimensional code on the display.