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

### Instruction:
Nadia walked 18 kilometers, which was twice as far as Hannah walked. How many kilometers did the two girls walk in total?

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