1. A device comprising: a K-input look-up table (K-LUT), the K-LUT arranged to receive a plurality of binary input signals at respective inputs of the K-LUT and to provide, at a plurality of outputs of the K-LUT, respective binary result signals indicative of at least two stages of a plurality of stages of arithmetic combination of the plurality of binary input signals; an input line network arranged to provide the plurality of binary input signals to the K-LUT, the input line network being configured to provide at least a first one of the plurality of binary input signals to both a first K-LUT portion and a second K-LUT portion in a first state, and provide a first carry-in signal to the first K-LUT portion and a second carry-in signal that is different than the first carry-in signal to the second K-LUT portion in a second state; and an output line network arranged to receive output signals from the K-LUT.