It is: 56
The number that both 7 and 8 can go into evenly is 56.
56
672
It is: 1
56
6
1
168
7 and 8 both go into 56
well, no number goes int 5 or 7 that can also go into 8 or 4.
Their LCM is 280
There are infinite numbers, but a fine example is just 7*8*10 or 560