What is the least common multiple of 4 and 12?

Oh, dude, the least common multiple of 4 and 12 is like the smallest number that both 4 and 12 can divide evenly into. So, basically, it's the smallest number where these two numbers can hang out and party together without any leftovers. In this case, the least common multiple of 4 and 12 is 12, because 12 is the smallest number that both 4 and 12 can divide into without any remainders.