Why do Europeans use commas in numbers?

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Tags

1. #comma
2. #countries
3. #however
4. #period
5. #european
6. #separator
7. #british
8. #multiplication
9. #avoid
10. #mathematicians
11. #point
12. #continued
13. #symbol
14. #popular
15. #decimal
16. #adopted
17. #confusing