What are the multiples of 3 and 4?

The multiples of 3 are 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, and so on.

The multiples of 4 are 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, and so on.

The common multiples of 3 and 4 would be 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132...