यदि 5 @ 2 ≠ 2 = 5 और 9 @ 4 ≠ 6 = 6 है, तो 7 @ 8 ≠ 4 = ?

Given:

1. 5 \text{ @ } 2 \text{ # } 2 = 5
2. 9 \text{ @ } 4 \text{ # } 6 = 6

Let's assume that '@' represents multiplication ($\times$) and '#' represents division ($\div$).
For the first example:

$$5 \times 2 \div 2 = 10 \div 2 = 5$$

This matches the given result.

For the second example:

$$9 \times 4 \div 6 = 36 \div 6 = 6$$

This also matches the given result.
The pattern is consistent: A \text{ @ } B \text{ # } C = A \times B \div C.

The expression is 7 \text{ @ } 8 \text{ # } 4.
Using the pattern, this translates to:

$$7 \times 8 \div 4$$

First, perform the multiplication:

$$7 \times 8 = 56$$

Next, perform the division:

$$56 \div 4 = 14$$

The value of 7 \text{ @ } 8 \text{ # } 4 is 14.