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

### Instruction:
 Roman, Mmiliki wa Kibanda cha Baa, ana sarafu za dhahabu zenye thamani ya $20. Anauza sarafu 3 za dhahabu kwa Dorothy. Baada ya kumlipa, anabakiwa na $12. Roman ana sarafu ngapi za dhahabu zilizobaki?


### Response:
 Dorothy alilipa $12 kwa sarafu 3 za dhahabu hivyo kila sarafu ya dhahabu inauzwa kwa $12/3 = $<<12/3=4>>4
Mmiliki wa Kibanda cha Baa alikuwa na sarafu za dhahabu zenye thamani ya $20 ambazo ni sawa na $20/$4 = <<20/4=5>>5 sarafu za dhahabu
Roman sasa ana $12 zenye thamani ya sarafu za dhahabu ambazo ni $12/$4 = <<12/4=3>>3
Roman ana sarafu 5-3 = <<5-3=2>>2 za dhahabu zilizobaki