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 |   The ornamental design for an electronic calculator, as shown.   | |||||||||||||||||
FIG. 1 is a front view of the present design;
FIG. 2 is a back view of the present design;
FIG. 3 is a left side view of the present design;
FIG. 4 is a right side view of the present design;
FIG. 5 is a top view of the present design;
FIG. 6 is a bottom view of the present design; and,
FIG. 7 is a perspective view of the present design.
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