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

### Instruction:
Of the 90 people on William's bus, 3/5 were Dutch. Of the 1/2 of the Dutch who were also American, 1/3 got window seats. What's the number of Dutch Americans who sat at the windows?

### Response:
 3/5 ya watu kwenye basi walikuwa Wadachi, hivyo 3/5 * 90 = <<3/5*90=54>>54 watu walikuwa Wadachi.
1/2 ya Wadachi walikuwa pia Wamarekani, hivyo 1/2 * 54 = <<1/2*54=27>>27 watu walikuwa Wadachi na Wamarekani.
1/3 ya Wamarekani Wadachi walipata viti vya dirisha, hivyo 1/3 * 27 = <<1/3*27=9>>9 watu walikuwa Wamarekani Wadachi na waliketi kwenye viti vya dirisha.