To solve this expression, follow the order of operations (PEMDAS).

56 / 8 + (18 * 4 - 72 / 3) / 3

First, perform the operations inside the parentheses:

18 * 4 = 72
72 / 3 = 24

So the expression becomes:

56 / 8 + (72 - 24) / 3

Next, do the subtraction inside the parentheses:

72 - 24 = 48

Therefore, the expression simplifies to:

56 / 8 + 48 / 3

Now, divide each part separately:

56 / 8 = 7
48 / 3 = 16

Finally, combine the results:

7 + 16 = 23

Thus, the answer is 23.