Answer:
Buddy you kinda need something to show the surface area of? or do you want the equation to find surface area? for a cube it's A=6a²
Between the 4 and the 7 is it a multiplication or an X?
If the multiplication sign, this is the solution

Answer:
255,024
Step-by-step explanation:
24 x 23 x 22 x 21
24 options for the first member
23 options for the second member
22 options for the third member
21 options for the last member
Multiply top by top
2 * -3 = -6
Multiply bottom
7 * 8 = 56
The answer is -6/56
Simplify = -3/28