It is another prefix recently adopted by the International System, along with Quetta and Ronna for multiples and quecto and ronto for submultiples. They are represented as follows: Queta as Q, Ronna as R, Quecto as q and ronto as r. In this case Ronna means or indicates a factor of 10 (raised to 27 power) and is called a thousand-trillion, in the Long Scale) and is used for multiples or infinitely large parts. It is a 10 followed by 27 zeros. Ronna (symbol R) is a prefix adopted by Sistema Internacional in 2022. It is clarified that in the Short Scale used by Spanish-speaking countries the Ronna would be called 1 Octillion (because our system uses 3 zeros less).
It is a prefix for a value raised to the twenty-seventh power, such as 10² 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 thousands, of three zeros, and hence the '27' because three zeros (000) by nine gives the 10 followed by 27 zeros as in the power of the example [note: in the case of the byte that is binary and always counts of thousands, a ronnabyte does look like 2 8313;]; and the name created by metrologist Richard Brown has an R added that is used as its symbol, because the E already has many other uses that could lead to confusion. See ronto- .
