FIG. 1 is a perspective view of a large button calculator according to our invention.
FIG. 2 is a front side view thereof.
FIG. 3 is a left side view thereof.
FIG. 4 is a right side view thereof.
FIG. 5 is a top view thereof.
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a rear side view thereof, the broken lines shown are for illustrative purposes only and form no part of the claimed design.