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

### Instruction:
 Nadia alitembea kilomita 18, ambayo ilikuwa mara mbili ya umbali alioutembea Hannah. Wasichana hao wawili walitembea umbali gani jumla?


### Response:
 Hannah alitembea kilomita 18 / 2 = <<18/2=9>>9.
Pamoja walitembea kilomita 18 + 9 = <<18+9=27>>27.