It is a prefix for a value raised to the twenty-seventh negative power, such as 10 8315;² 8311; . It is taken from Greek 949; 957; 957; 949; 945; ( ennéa "nine" ) , and this needs two explanations: first, the 9 is because it counts groups of thousandths, of three zeros for decimals, and hence '27' because three zeros for decimal (0, 000) by nine gives 1/1000 8315; 8313; , or what is the same 0 , 000 82''000 82''000 82''000 82''000 82''000 82''000 82''000 82''001; and the name has added an r that is used as its symbol, because the e already has many other uses that could generate confusion, in addition to a /t/ which is a convention for submultiples that differentiates the pronunciation of the Ronna- multiple.
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