For example, for the numbers $2$ and $3$ it would be $6$, which is the smallest number that's evenly divisible by both $2$ and $3$.
More examples: for $10$ and $40$ it would be $40$. For $7$ and $11$ it would be $77$. For $3$ and $5$ it would be $15$. For $250$ and $375$ it would be $750$.
The answer is least common multiple. Any number that $250$ divides evenly into is called a multiple of $250$. And any number that $375$ divides evenly into is called a multiple of $375$. The two numbers necessarily have some multiples in common, and $750$ is the smallest (positive) such number. Hence the phrase least common multiple.