Twenty-seven.
The plural is written 3s or threes when referring to the number itself, or sets or groups of three. - e.g. Seven threes are twenty-one. There are four 3s in his license plate number. We divided the group into threes for the scavenger hunt.
54 / 4 = 13.5
54 divided by 9 and 6 :p
0.0101
0.0192
0.5806
54
0.8889
0.1667
-126
18