The Calculator has five miscellaneous functions, shown in Figure 8-8.
See the section "Calculator Function Keys", or the calctool manual page, for more information about the Calculator keyboard mapping.
Accuracy (Acc) chooses the number of digits of precision used in the calculator display. This key has a pop-up menu associated with it, which lets you specify 0 through 9 radix places. The default value is 2 radix places.