You can use equal temperament with any number of divisions of the octave (or other interval, e.g. Bohen-Pierce tuning's equal division of the "tritave" into 13)

You can use equal temperament with any number of divisions of the octave (or other interval, e.g. Bohen-Pierce tuning's equal division of the "tritave" into 13). Some of these provide excellent approximations of common just intonation intervals, e.g. dividing the octave into 53 gives you fifths that are only 0.07 cents off the just interval, and all other intervals in standard 5-limit Western harmony within 1.5 cents of just. It's simpler to compose with than stacking frequency ratios and in practice sounds equally good.