Pascal was married to Antoinette Arnold.
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After many research I've come to think that Blaise Pascal was married to Antoinette Arnold. I had to figure this out for a school project, and most of other answers say he was married to Gilbert Pascal, who is really his sister, Jacqueline Pascal, his other sister, Antoinette Begon, his mother (died when Blaise was 3), or Etienne Pascal, his father. But after half an hour I have enough evidence to say that Antoinette Arnold was in fact his wife.
Just that: Blaise Pascal.
blaise pascal invented the calculator
Blaise Pascal invented the Pascaline, a type of calculater that was perfected when he was 30.