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

### Instruction:
Olga has an aquarium with fish in 5 different colors. There are 12 yellow ones, half as many blue ones, and twice as many green ones as yellow ones. How many fish does Olga have in her aquarium?

### Response:
 Olga ana nusu ya idadi ya samaki wa rangi ya bluu kama samaki wa rangi ya manjano, ambayo inamaanisha samaki 12 * 1/2 = <<12*1/2=6>>6 wa rangi ya bluu.
Samaki wa rangi ya kijani ni mara mbili ya idadi ya samaki wa rangi ya manjano, kwa hivyo jumla kuna samaki 12 * 2 = <<12*2=24>>24 wa rangi ya kijani.
Hivyo, jumla ya samaki wote ni 12 + 6 + 24 = <<12+6+24=42>>42.