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

### Instruction:
The region east of plain A is 50 square miles less than the region east of plain B. If plain B has 200 square miles, how many square miles do the plains have in total?

### Response:
 Eneo la tambarare A lina jumla ya maili za mraba 200 - 50 = 150.
Jumla ya maili za mraba kwa tambarare zote ni 150 maili za mraba kwa tambarare A + 200 maili za mraba kwa tambarare B = <<150+200=350>>350 maili za mraba.