What is the smallest number that any of those numbers could go into evenly?
To find least common multiple problems, start with the highest number in the set. Is that itself the least common multiple? It is if the other numbers in the set go into it evenly. If one of the other numbers don’t go into it evenly, then you have to start going through multiples of that highest number, and check each of them.
If you had 4, 16, and 32, you would check 32 first. Since 4 goes into 32 evenly 8 times, 16 goes into 32 evenly twice, and 32 goes into 32 evenly once, then 32 itself is the least common multiple
If you had 4, 5, and 10, you would check 10 first. 5 goes into 10 evenly twice, but 4 does not go into 10 evenly. So you go to the next multiple of 10, which is 20. 4 goes into 20 5 times, 5 4 times, and 10 twice. So 20 is the LCM here.
Now do the same thing with your numbers. Which of them is the highest number? Do the other numbers go into it evenly? If so, that itself is the LCM. If not, multiple the highest number by 2, and try that one. If it still doesn’t, try the highest times 3, and so on and so on.