Assertion: pascal's calculator | /r/Synonym | the pascaline
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Source sentences:
text: In 1642, in an effort to ease his father's endless, exhausting calculations, and recalculations, of taxes owed and paid (into which work the young Pascal had been recruited), Pascal, not yet 19, constructed a mechanical calculator capable of addition and subtraction, called Pascal's calculator or the Pascaline.
text: In 1642 (then not yet nineteen), he constructed a mechanical calculator capable of addition and subtraction, known as Pascal's Calculator (or the Pascaline), the first and most basic of around fifty he built over the course of his life.