Lowest Common Multiple (LCM):

 

The first step is to do the prime factorization of the two numbers and write them out as seen in the photo.

The second step is to match the numbers on both prime factorizations just like how here you can match the 4 pairs of 2’s.   

Then you write out the matched numbers times the numbers that were left, which in this case there was a 3 and a 7.

 

The third and last step is to simply multiply all of it and here the answer and the lowest common multiple (LCM) would be 336.