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

### Instruction:
Steve owns a lake shop that sells fish. He has a stock of 200 fish. He sells 50 fish and because his refrigerators stop working a third of the remaining fish become spoiled. A new stock of 200 more fish arrives. How many fish does he have in stock now?

### Response:
 Alikuwa na samaki 200 - 50 = <<200-50=150>>150 waliobaki.
Samaki 150 * 1/3 = <<150*1/3=50>>50 wanaharibika.
Kwa hivyo sasa ana samaki 150 - 50 = <<150-50=100>>100.
Kisha anapata hisa mpya ya samaki 200 + 100 = <<200+100=300>>300 samaki.
Hivyo sasa ana hisa ya samaki 300.