Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Susan has 3 fish tanks to fill. 1 fish tank contains 7 goldfish and 8 beta fish. The second fish tank contains twice as many fish as the first tank and the third fish tank has a third of the number of fish in the second fish tank. How many fish are in the third fish tank?

### Response:
 Katika bwawa la kwanza, kuna samaki 7 wa dhahabu + samaki 8 wa beta = <<7+8=15>>15 samaki.
Hivyo bwawa la pili lina samaki 15 katika bwawa la kwanza * 2 = <<15*2=30>>30 samaki.
Hii inamaanisha bwawa la tatu lina samaki 30 katika bwawa la pili / 3 = <<30/3=10>>10 samaki.