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

### Instruction:
There are 12 carpets in house 1, 20 carpets in house 2, and 10 carpets in house 3. If house 4 has twice as many carpets as house 3, how many carpets do all 4 houses have in total?

### Response:
 Nyumba ya 1 ina zulia 12, nyumba ya 2 ina zulia 20, nyumba ya 3 ina zulia 10, na nyumba ya 4 ina zulia 8 zaidi ya nyumba ya 3, hivyo nyumba ya 4 ina zulia 18.
12 + 20 + 10 + 18 = <<12+20+10+18=60>>60 zulia.