The number of four is greater than 1 and greater than 1 is equivalent to less than 3.

Five five is more than two, and two more equals three less.

The number of six is more than three, and three more equals three less.

Therefore, a * * * is at least the least common multiple of 4, 5 and 6 minus 3, that is

The least common multiple of 4, 5 and 6 is 60.

60-3=57 (pieces)