1. A method performed by a processor of a computational device, the computational device having a storage, the method comprising: with the processor, interacting with a parameter, the parameter for tracking a number of performed arithmetic operations, calculating a growth rate of a word length for storing a result in a storage of the computational device, where: the result is produced based on the performing the arithmetic operations using a plurality of numbers, the calculating is based on the parameter, the growth rate is related to the number of performed arithmetic operations, and the growth rate is independent of a length of the plurality of numbers used in the performed arithmetic operations, and allocating a word of a first word length in the storage of the computational device for storing a result of a selected one of the performed arithmetic operations, allocating a word of a second word length in the storage of the computational device for storing the result of one of the performed arithmetic operations that is performed subsequent to the selected one of the performed arithmetic operations in the storage, wherein the second word length is based on the calculated growth rate.