Answer :

To determine the value of [tex]\( m \times n \)[/tex] given that [tex]\( m = -7 \)[/tex] and [tex]\( n = 4 \)[/tex], we follow these steps:

1. Identify the values given:
- [tex]\( m = -7 \)[/tex]
- [tex]\( n = 4 \)[/tex]

2. Substitute the values of [tex]\( m \)[/tex] and [tex]\( n \)[/tex] into the expression [tex]\( m \times n \)[/tex]:
- [tex]\( m \times n = -7 \times 4 \)[/tex]

3. Evaluate the multiplication:
- The product of -7 and 4 is -28.

Therefore, the value of [tex]\( m \times n \)[/tex] is [tex]\( \boxed{-28} \)[/tex].