
Hope you could get an idea from here.
Doubt clarification - use comment section.
Answer:
the answer is 12b
Step-by-step explanation
Multiply 4 by 3 and keep b
The surface area, I believe, is 584,064.
Broken down, the formula is really 312 x 312 x 6
312 x 312 = 97,344 97,344 x 6 = 584,064......... There is your answer.
SA = 584,064