First, multiply the top layer. 9 times 8 is 72.
now multiply the next layer. its not 15 times 20. its 7 times 20. remember the 9 times 8? well the 8 is a part of the 15. 15-8 is 7. 7 times 20 is 140. now add 140 and the 72 from the beginning. 140+72 is = to 212. please give me THE BRAINLIEST ANSWER.
