Find least common multiple of 8 and 10

The multiples of 8 are: 8, 16, 24, 32, 40, 48, 56, ...

The multiples of 10 are: 10, 20, 30, 40, 50, 60, ...
From the lists of multiples, we can see that the least common multiple of 8 and 10 is 40.