The answer is 9900000000 (thats 8 zeros) What you do is you find 10^10 which is 10000000000 (ten zeros) and multiply that by 7.92 to get 79200000000 then you just multiply it by 1/8 to get the answer.
Answer:
Step-by-step explanation:

Wow, that IS really BRAINLY! I’m so jealous
The answer is his tank can hold 15 gallons i think