1. A floating point multiply and add operation unit for carrying out an arithmetic operation, comprising: processing circuitry configured to obtain two factors and a summand as input variables, that each is in a floating point value format, process the input variables, and output, based on the processing, a computation result in a floating point value format; wherein: the processing includes multiplying the factors and adding (a) a product of the multiplication and (b) the summand; and a bit resolution of the multiplied factors is lower than a bit resolution of the summand and is lower than a bit resolution of the computation result.