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Tja "getallen van pi" is geen goed Nederlands. I hate to break it to you but "getallen van pi" is incorrect (in) Dutch. I am assuming you tried to translate digits (of pi)? Een getal and a digit are not the same, 236 for instance is een getal but not a digit.
You could use the word "cijfer" (which are the symbols 0,1,2,3,4,5,6,7,8,9). However "decimalen" works as well and might even be better because it refers specifically to the digits after the decimal point (in Dutch a comma is used not a point/period btw), which is really what you are after here (everyone knows pi starts with a 3).
You could use the word "cijfer" (which are the symbols 0,1,2,3,4,5,6,7,8,9). However "decimalen" works as well and might even be better because it refers specifically to the digits after the decimal point (in Dutch a comma is used not a point/period btw), which is really what you are after here (everyone knows pi starts with a 3).