A kilogram (2.2 lbs) is much too massive to be a calculator. Most likely a modern calculator would way a few grams.
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gram
one gram roughly
About 1 gram
A kilogram.A kilogram.A kilogram.A kilogram.
Most big books weigh a kilogram (1000 grams). Chapter books weigh roughly half a kilogram, and children's books, 50 grams.