684•397-584•397

To solve this problem, we can follow the order of operations (PEMDAS/BODMAS).

First, let's calculate the multiplication:

684 • 397 = 271,548

584 • 397 = 231,848

Now, let's subtract the two results:

271,548 - 231,848 = 39,700

So, 684 • 397 - 584 • 397 = 39,700.