Please answer all parts in this one as well and show work. thank you :)

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Which one ? is the answer and how to find this answer

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16